Merge branch 'load-permission-definitions' into 'master'

Init custom role definitions from yaml files

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/138313



Merged-by: Siddharth Dungarwal <sdungarwal@gitlab.com>
Approved-by: mo khan <mo@mokhan.ca>
Approved-by: Siddharth Dungarwal <sdungarwal@gitlab.com>
Reviewed-by: mo khan <mo@mokhan.ca>
Co-authored-by: Jarka Košanová <jarka@gitlab.com>