Merge branch '438045_remove_ff' into 'master'

Remove `global_file_size_check` feature flag

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/173546



Merged-by: Jerry Seto <jseto@gitlab.com>
Approved-by: Jerry Seto <jseto@gitlab.com>
Co-authored-by: Vasilii Iakliushin <viakliushin@gitlab.com>