feat: saturation monitoring gitaly repo cgroup
What
- Include the cgroups under
/gitaly/gitaly-pid
in saturation monitoring. - Update resource labels to filter by
id
as well.
Why
We need to be aware if we are saturating any cgroups for the repositories. One concern we have here is that it might be too noisy of an alert since we are adding more cgroups.
Reference: https://gitlab.com/gitlab-com/gl-infra/reliability/-/issues/16240