Placement score

[rokej]

Description of the change(s):

• Instead of waiting for the hosted cluster's overall status to be completed, which means all nodepools are available as well, once the hosted control plane to be available, copy kubeconfig secret into the klusterlet namespace to finish cluster registration.

  - lastTransitionTime: "2022-11-22T01:19:50Z"
    message: The hosted control plane is available
    observedGeneration: 3
    reason: HostedClusterAsExpected
    status: "True"
    type: Available

• Whenever the hypershift agent reconciles hosted clusters, it should generate addOnPlacementScore with the number of hosted clusters as a score value in the hosting cluster's namespace on the hub.

apiVersion: cluster.open-cluster-management.io/v1alpha1
kind: AddOnPlacementScore
metadata:
  creationTimestamp: "2022-11-20T16:55:25Z"
  generation: 1
  name: hosted-clusters-score
  namespace: local-cluster
  resourceVersion: "9747083"
  uid: 10020399-3c5b-4d71-b202-cee0ad398232
status:
  scores:
  - name: hostedClustersCount
    value: 1

Why do we need this PR:

• Hosted cluster placement scheduler can use the addOnPlacementScore to determine the least used hosting cluster and place a new hosted cluster.

Issue reference:

• https://issues.redhat.com/browse/ACM-2162

Test API/Unit - Success

Running tool: /usr/local/go/bin/go test -timeout 180s -coverprofile=/var/folders/6m/zwb5lxd157bgxp_wm4bv95fc0000gn/T/vscode-goEd8Foq/go-code-cover -run ^TestReconcile$ github.com/stolostron/hypershift-addon-operator/pkg/agent

ok  	github.com/stolostron/hypershift-addon-operator/pkg/agent	0.743s	coverage: 28.6% of statements

[rokej]

/test e2e

[rokej]

/retest-required

[rokej]

/test e2e

[rokej]

/test e2e

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
1 Code Smell

80.0% Coverage
0.0% Duplication

[o-farag]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: o-farag, rokej

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