Merge branch 'rodrigo/enable_github_import_lock_user_finder_ff' into 'master'

Enable github_import_lock_user_finder feature flag by default

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/143118



Merged-by: Bojan Marjanovic <bmarjanovic@gitlab.com>
Approved-by: Bojan Marjanovic <bmarjanovic@gitlab.com>
Reviewed-by: Bojan Marjanovic <bmarjanovic@gitlab.com>
Co-authored-by: Rodrigo Tomonari <rtomonari@gitlab.com>