[Not tested!] Adds option to sync branches with specific commit-id

[frenzyfriday]

This will allow the user to pass a commit-id, thus the stable branch can be synced to a specific commit on main and not always HEAD
This can be triggered by:

  curl -L \
  -X POST \
  -H "Accept: application/vnd.github+json" \
  -H "Authorization: Bearer <PAT>" \
  -H "X-GitHub-Api-Version: 2022-11-28" \
  https://api.github.com/repos/openstack-k8s-operators/ci-framework/dispatches \
  -d '{"event_type":"trigger-sync","client_payload":{"source-branch":"main","target-branch":"stable","commit-id":"abcd123"}}'

[openshift-ci]

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[github-actions]

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