Set resource requests/limits for Atlantis and silence successful policy checks
What
Set resource requests/limits for Atlantis.
Also silence successful policy checks.
Why
There are no resource requests/limits configured by default.
Also Atlantis is very CPU and memory hungry for some config-mgmt
MRs.
Part of https://gitlab.com/gitlab-com/gl-infra/reliability/-/issues/24613
Edited by Pierre Guinoiseau