Add a manual dry-run job with CE repository .triage-policies.yml
For now the manual dry-run job is using the .triage-policies.yml
in this repository, while it's nice to run this against target repository with a branch configuration via variable.
This way we could trigger a manual pipeline with something like $PROJECT_ID=gitlab-org/gitlab-ce
and $PROJECT_BRANCH=gl-triage
to target the current triage polices in CE.
And with $PROJECT_BRANCH=gl-triage-MR
we could even trigger this against an arbitrary branch for reviewing the effect on CE merge requests.