Merge branch '513365-fix-before-sha-in-pipeline-execution-policy' into 'master'

Include before_sha in PEP pipelines

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/182876



Merged-by: Furkan Ayhan <furkanayhn@gmail.com>
Approved-by: Martin Čavoj <mcavoj@gitlab.com>
Approved-by: Furkan Ayhan <furkanayhn@gmail.com>
Reviewed-by: Furkan Ayhan <furkanayhn@gmail.com>
Reviewed-by: Martin Čavoj <mcavoj@gitlab.com>
Co-authored-by: Andy Schoenen <aschoenen@gitlab.com>