Disable Grafana service after dropping it

This is a fix on top of  that disables Grafana runit service
after it is removed.

Related to:

  https://gitlab.com/gitlab-org/omnibus-gitlab/-/merge_requests/7069

Changelog: fixed

Author: pursultani

files/gitlab-cookbooks/monitoring/recipes/default.rb

@@ -24,3 +24,8 @@
     include_recipe "monitoring::#{cookbook_name}_disable"
   end
 end
+
+# Disable Grafana service.
+runit_service 'grafana' do
+  action :disable
+end