Update containers postgresql_details.json dashboard to use pgMonitor v5.2.1 metrics. (#470)

Update other containers dashboards to use ccp metrics and maintain compatibility with postgres_exporter metrics. Add pgBouncer dashboard. Ignore pgBouncer in non-pgBouncer dashboards.

Author: dsessler7

changelogs/fragments/470-containers-dashboard-updates.yml

@@ -0,0 +1,3 @@
+minor_changes:
+ - Updated containers dashboards to use latest ccp metrics in v5.2.1
+ - Add pgBouncer dashboard to containers folder