[obs] Fix GitpodWorkspaceTooManyRegularNotActiveMk2 given https://www.gitpodstatus.com/incidents/bsrqgmsxw1gr

Author: kylos101

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

@@ -28,7 +28,7 @@ spec:
         summary: too many running but inactive workspaces
         description: too many running but inactive workspaces.
       expr: |
-        gitpod_workspace_regular_not_active_percentage_mk2 > 0.08
+        sum(gitpod_workspace_regular_not_active_percentage_mk2) by(cluster) > 0.08
         AND
         sum(gitpod_ws_manager_mk2_workspace_activity_total) by(cluster) > 25
 
@@ -41,6 +41,6 @@ spec:
         summary: workspaces are not starting.
         description: inactive regular workspaces exists but workspaces are not being started.
       expr: |
-        avg_over_time(gitpod_workspace_regular_not_active_percentage_mk2[1m]) > 0
+        sum by(cluster) (avg_over_time(gitpod_workspace_regular_not_active_percentage_mk2[1m]) > 0)
         AND
         rate(gitpod_ws_manager_mk2_workspace_startup_seconds_sum{type="Regular"}[1m]) == 0