api and kube versions from argocd build env vars

[martijnvdp]

PR to add api versions and cluster versions to the helm template command
there both available in the build environment variables

KUBE_VERSION = the version of kubernetes cluster
KUBE_API_VERSIONS = the version of kubernetes APIs (csv formated string)

https://argo-cd.readthedocs.io/en/stable/user-guide/build-environment/

tested it in argocd and this works , i'm getting the correct cluster version and
created a configmap with all api versions
issue: #57

apiVersion: v1
kind: ConfigMap
metadata:
  name: lovely-test
  namespace: lovely-test
data:
  apiVersions.txt: |
    {{ .Capabilities.APIVersions }}

[martijnvdp]

I also see there still is an open issue with specifying multiple api versions, helm will see it currently as one single capability
helm/helm#11485
so i have to specify each api version with --api-versions param

this wont be needed if the outstanding pr at helm gets merged which makes it possible to use csv format
and the KUBE_API_VERSIONS in the build env is already csv

[github-actions]

GoGitOps Review

Grade: A+ (100.0%)

Files: 12

Issues: 0

gofmt: 100%

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[Joibel]

Thanks for this, it looks great.