feat: add type=patroni for postgres alerts
What
Add the label type=patroni
for all the alerts around postgresql
Why
In https://gitlab.com/gitlab-com/gl-infra/reliability/uploads/0aebe2aea09e6ba54420cd4879e698fa/Screenshot_2022-07-15_at_09.45.35.png
we see the on-call getting paged twice for the same service. This alert
was not grouped, this is because the cause
based alerts are missing
the type
label.
Reference: https://gitlab.com/gitlab-com/gl-infra/reliability/-/issues/16051