Steve Hipwell authored Mar 16, 2022 and Jason Plum committed Mar 16, 2022

Adds Prometheus Operator' ServiceMonitor and PodMonitor objects to the GitLab
charts. When these are enabled, "traditional" Prometheus annotations will be
removed.

Refactors various metrics port names and exposures to be consistent, and more
aligned to kubernetes practices as a results of consumption by ServiceMonitors.

NOTICE:
These _require_ the `Capabilities.APIVersions` list to include `"monitoring.coreos.com/v1`
to template, even if enabled. If you enable these, but do not have the appropriate
provider present within the cluster, or APIVersions added to `helm template`, they
will not be rendered.

Signed-off-by: Steve Hipwell <steve.hipwell@gmail.com>