Merge branch 'andyschoenen/add-ensure_pipeline_policy_pre_stage_complete_group-ff' into 'master'

Add additional group level feature flag for ensure_pipeline_policy_pre_stage_complete

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/176192



Merged-by: Pedro Pombeiro <noreply@pedro.pombei.ro>
Approved-by: Marcos Rocha <mrocha@gitlab.com>
Approved-by: Pedro Pombeiro <noreply@pedro.pombei.ro>
Reviewed-by: Pedro Pombeiro <noreply@pedro.pombei.ro>
Co-authored-by: Andy Schoenen <aschoenen@gitlab.com>