Merge branch 'ph/467953/addCheckingStateToMergeChecksComponent' into 'master'

Added checking state to the merge checks component

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/167895



Merged-by: Jose Ivan Vargas <jvargas@gitlab.com>
Approved-by: Jose Ivan Vargas <jvargas@gitlab.com>
Reviewed-by: Jose Ivan Vargas <jvargas@gitlab.com>
Reviewed-by: Duo Code Reviewer <duo-code-review-bot@gitlab.com>
Co-authored-by: Phil Hughes <me@iamphill.com>