Merge branch 'ig-add-namespace-to-github-importer-messages' into 'master'

Add namespace to Github Importer messages

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/144888



Merged-by: Carla Drago <cdrago@gitlab.com>
Approved-by: Carla Drago <cdrago@gitlab.com>
Approved-by: James Nutt <jnutt@gitlab.com>
Reviewed-by: James Nutt <jnutt@gitlab.com>
Co-authored-by: Ivane Gkomarteli <ivanegkomarteli@Ivanes-MacBook-Pro.local>