Merge branch 'speed-up-regenerate-schema' into 'master'

Speed up ./scripts/regenerate-schema

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/145159



Merged-by: Peter Leitzen <pleitzen@gitlab.com>
Approved-by: Peter Leitzen <pleitzen@gitlab.com>
Reviewed-by: Peter Leitzen <pleitzen@gitlab.com>
Co-authored-by: Dmitry Gruzd <dgruzd@gitlab.com>