Merge branch 'pedropombeiro/448507/add-unit-tests' into 'master'

Add unit tests for runner creation metrics

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/147376



Merged-by: Miguel Rincon <mrincon@gitlab.com>
Approved-by: Laura Callahan <lmeckley@gitlab.com>
Approved-by: Miguel Rincon <mrincon@gitlab.com>
Reviewed-by: Pedro Pombeiro <noreply@pedro.pombei.ro>
Reviewed-by: Laura Callahan <lmeckley@gitlab.com>
Co-authored-by: Pedro Pombeiro <noreply@pedro.pombei.ro>