Merge branch '431198_remove_use_lock_for_update_repository_storage_ff' into 'master'

Cleanup "use_lock_for_update_repository_storage" feature flag

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/138346



Merged-by: Hordur Freyr Yngvason <hfyngvason@gitlab.com>
Approved-by: Joe Woodward <jwoodward@gitlab.com>
Approved-by: Hordur Freyr Yngvason <hfyngvason@gitlab.com>
Co-authored-by: Vasilii Iakliushin <viakliushin@gitlab.com>