Merge branch...

Merge branch '475215-add-alert-informing-the-user-about-new-editing-flow-for-branch-rules' into 'master' 

Add branch rules alert on repo setting page

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/163237



Merged-by: Avielle Wolfe <awolfe@gitlab.com>
Approved-by: Michael Le <mle@gitlab.com>
Approved-by: Jack Chapman <jachapman@gitlab.com>
Approved-by: Thomas Hutterer <thutterer@gitlab.com>
Approved-by: Avielle Wolfe <awolfe@gitlab.com>
Reviewed-by: Michael Le <mle@gitlab.com>
Reviewed-by: Thomas Hutterer <thutterer@gitlab.com>
Co-authored-by: Chaoyue Zhao <czhao@gitlab.com>