[core] Handle missing configmap by Cozystack

[kvaps]

Cozystack pod fails with the error if configmap is not applied during the initial setup:

helm template -n cozy-system platform . --dry-run=server -a admissionregistration.k8s.io/v1 -a apiextensions.k8s.io/v1 -a apiregistration.k8s.io/v1 -a apps/v1 -a authentication.k8s.io/v1 -a authorizat │
│ namespace/cozy-public unchanged                                                                                                                                                                          │
│ namespace/cozy-system unchanged                                                                                                                                                                          │
│ namespace/cozy-cert-manager unchanged                                                                                                                                                                    │
│ namespace/cozy-cilium unchanged                                                                                                                                                                          │
│ namespace/cozy-fluxcd unchanged                                                                                                                                                                          │
│ namespace/cozy-grafana-operator unchanged                                                                                                                                                                │
│ namespace/cozy-kamaji unchanged                                                                                                                                                                          │
│ namespace/cozy-cluster-api unchanged                                                                                                                                                                     │
│ namespace/cozy-dashboard unchanged                                                                                                                                                                       │
│ namespace/cozy-kubeovn unchanged                                                                                                                                                                         │
│ namespace/cozy-kubevirt unchanged                                                                                                                                                                        │
│ namespace/cozy-kubevirt-cdi unchanged                                                                                                                                                                    │
│ namespace/cozy-linstor unchanged                                                                                                                                                                         │
│ namespace/cozy-mariadb-operator unchanged                                                                                                                                                                │
│ namespace/cozy-metallb unchanged                                                                                                                                                                         │
│ namespace/cozy-monitoring unchanged                                                                                                                                                                      │
│ namespace/cozy-postgres-operator unchanged                                                                                                                                                               │
│ namespace/cozy-rabbitmq-operator unchanged                                                                                                                                                               │

│ namespace/cozy-redis-operator unchanged                                                                                                                                                                  │
│ namespace/cozy-telepresence unchanged                                                                                                                                                                    │
│ namespace/cozy-victoria-metrics-operator unchanged                                                                                                                                                       │
│ make: Leaving directory '/cozystack/packages/core/platform'                                                                                                                                              │
│ Error from server (NotFound): deployments.apps "source-controller" not found                                                                                                                             │
│ Error from server (NotFound): deployments.apps "helm-controller" not found                                                                                                                               │
│ make: Entering directory '/cozystack/packages/system/cilium'                                                                                                                                             │
│ helm upgrade -i -n cozy-cilium cilium .                                                                                                                                                                  │
│ Release "cilium" has been upgraded. Happy Helming!                                                                                                                                                       │
│ NAME: cilium                                                                                                                                                                                             │
│ LAST DEPLOYED: Thu Mar 14 14:34:53 2024                                                                                                                                                                  │
│ NAMESPACE: cozy-cilium                                                                                                                                                                                   │
│ STATUS: deployed                                                                                                                                                                                         │
│ REVISION: 7                                                                                                                                                                                              │
│ TEST SUITE: None                                                                                                                                                                                         │
│ make: Leaving directory '/cozystack/packages/system/cilium'                                                                                                                                              │
│ make: Entering directory '/cozystack/packages/system/kubeovn'                                                                                                                                            │
│ helm upgrade -i -n cozy-kubeovn kubeovn .                                                                                                                                                                │
│ Release "kubeovn" does not exist. Installing it now.                                                                                                                                                     │

│ Error: template: cozy-kubeovn/charts/kube-ovn/templates/ovncni-ds.yaml:59:42: executing "cozy-kubeovn/charts/kube-ovn/templates/ovncni-ds.yaml" at <index $cozyConfig.data "ipv4-svc-cidr">: error calli │
│ make: *** [Makefile:8: apply] Error 1                                                                                                                                                                    │
│ make: Leaving directory '/cozystack/packages/system/kubeovn'                                                                                                                                             │
│ time="2024-03-14T14:34:54Z" level=fatal msg="failed to run" err="exit status 2"

I think in this case it should not fail, but create a new configmap with default values.

[kvaps]

Closed in favor #63