[obs] Add GitpodWorkspaceTooManyRegularNotActiveMk2 back as critical

Related to ENG-20

Now that we have related data, we should resume triggering alerts if the data condition occurs.

Author: kylos101

operations/observability/mixins/workspace/rules/satellite/workspaces.yaml

@@ -21,7 +21,8 @@ spec:
     rules:
     - alert: GitpodWorkspaceTooManyRegularNotActiveMk2
       labels:
-        severity: warning
+        severity: critical
+        # TODO: replace this expression with anomaly detection similar to GitpodImageBuildDurationAnomaly, once we have related data
       for: 10m
       annotations:
         runbook_url: https://github.com/gitpod-io/runbooks/blob/main/runbooks/GitpodWorkspaceTooManyRegularNotActive.md