Feat: RunOnInfra to use openshift.io/node-selector annotation on namespace

[anandrkskd]

What type of PR is this?
/kind enhancement

What does this PR do / why we need it:
This PR changes RunOnInfra field implementation it adds openshift.io/node-selector="node-role.kubernetes.io/infra=“ annotation on namespace and let openshift make sure the pods are scheduled on infra nodes. Previous implementation used to add node-role label to resources directly.

Have you updated the necessary documentation?

• Documentation update is required by this PR.
• Documentation has been updated.

Which issue(s) this PR fixes:

Fixes GITOPS-9926

Test acceptance criteria:

• Unit Test
• E2E Test

How to test changes / Special notes to the reviewer:

• run make install run
• Update the default GitopsService CRD with spec.runOnInfra: true
• make sure the nodes are properly labeled

kubectl label node/<node-name> node-role.kubernetes.io/infra=""

• check if the pods are scheduled on the right Nodes.
• check if the namespace contains annotations openshift.io/node-selector="node-role.kubernetes.io/infra=“

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