Merge branch 'pedropombeiro/415447/remove-ffs' into 'master'

Remove create_runner_workflow_for_* feature flags

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/123785



Merged-by: Vladimir Shushlin <vshushlin@gitlab.com>
Approved-by: Vladimir Shushlin <vshushlin@gitlab.com>
Approved-by: Minahil Nichols <minahilnichols@gitlab.com>
Reviewed-by: Pedro Pombeiro <noreply@pedro.pombei.ro>
Reviewed-by: Anna Vovchenko <avovchenko@gitlab.com>
Reviewed-by: Fiona Neill <fneill@gitlab.com>
Co-authored-by: Pedro Pombeiro <noreply@pedro.pombei.ro>
Co-authored-by: Miguel Rincon <mrincon@gitlab.com>