Merge branch '461878-unified-backups-block-in-restore-private-method-warn-called-for-gitlab-backup-cli-output' into 'master' 

UB: fix use of `warn` method instead of `warning` for outputing messages

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/153165



Merged-by: Aakriti Gupta <agupta@gitlab.com>
Approved-by: Aakriti Gupta <agupta@gitlab.com>
Approved-by: Kyle Yetter <kyetter@gitlab.com>
Reviewed-by: Kyle Yetter <kyetter@gitlab.com>
Co-authored-by: Gabriel Mazetto <gabriel@gitlab.com>