Merge branch 'jnutt/link-import-failure-to-iid' into 'master'

Save external_identifiers on ImportFailure for file import relations

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/139653



Merged-by: drew stachon <730684-drew@users.noreply.gitlab.com>
Approved-by: Bishwa Hang Rai <bhrai@gitlab.com>
Approved-by: drew stachon <730684-drew@users.noreply.gitlab.com>
Reviewed-by: Bishwa Hang Rai <bhrai@gitlab.com>
Co-authored-by: James Nutt <jnutt@gitlab.com>