CNTRLPLANE-3233: ci(gha): add release-4.22 branch to GitHub Actions workflows

[bryan-cox]

Summary

• Add release-4.22 to the branch triggers for all applicable GitHub Actions workflows so PRs targeting that branch get the same CI checks as main
• Replace hardcoded git fetch origin main:main in lint workflow with dynamic github.base_ref reference
• sync-community-fork.yaml excluded (only relevant for main)

Updated workflows: codespell, cpo-container-sync, docs-preview, envtest-kube, envtest-ocp, gitlint, lint, test, verify

Resolves: CNTRLPLANE-3233

Test plan

• Verify GHA workflows trigger on PRs targeting release-4.22
• Verify lint job correctly fetches the base branch ref

🤖 Generated with Claude Code

[openshift-ci-robot]

@bryan-cox: This pull request references CNTRLPLANE-3233 which is a valid jira issue.

Warning: The referenced jira issue has an invalid target version for the target branch this PR targets: expected the task to target the "4.22.0" version, but no target version was set.

Details

In response to this:

Summary

• Add release-4.22 to the branch triggers for all applicable GitHub Actions workflows so PRs targeting that branch get the same CI checks as main
• Replace hardcoded git fetch origin main:main in lint workflow with dynamic github.base_ref reference
• sync-community-fork.yaml excluded (only relevant for main)

Updated workflows: codespell, cpo-container-sync, docs-preview, envtest-kube, envtest-ocp, gitlint, lint, test, verify

Resolves: CNTRLPLANE-3233

Test plan

• Verify GHA workflows trigger on PRs targeting release-4.22
• Verify lint job correctly fetches the base branch ref

🤖 Generated with Claude Code

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[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: bryan-cox

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[bryan-cox]

/area ci-tooling

[openshift-ci]

@bryan-cox: all tests passed!

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[bryan-cox]

/verified by gha

[openshift-ci-robot]

@bryan-cox: This PR has been marked as verified by gha.

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/verified by gha

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[sjenning]

/lgtm