chore(actions): add ci job for branch protection

[ashwinkumar6]

Issue context

When a workflow is executed, if a job fails then successive jobs are skipped and the execution stops. If branch protection depends on a successive job that was skipped then it doesn't block merging. In other words a job has to fail for branch protection to block merging

Github docs: Require status checks before merging

Required status checks ensure that all required CI tests are either passing or skipped before collaborators can make changes to a protected branch.

• Branch protection on 'PASSED' job (notice the "required" PR validation job)

• Branch protection on 'FAILED with branch protection' job

• Branch protection on 'SKIPPED / FAILED without branch protection' job

Description of changes

Add an additional ci job, that will always run and would either pass / fail (cannot be skipped) based on required checks

Other solutions considered

• Add two additional jobs update-success and update-failure which would only run on success and failure respectively (amplify-ui reference)
• Use 3rd party action, alls-green

On the amplify-ui repository, on PR we run test-fork-prs / test-internal-prs. These have two jobs at the end update-success-status and update-failure-status.

Description of how you validated changes

Tested on fork

• Success case PR
• Failure case PR

Checklist

• PR description included

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[jimblanc]

LGTM, thank you for fixing this!!