[release-11.5.2] Fix: Optimise frontend Postgresql plugin cache busting (#100411)

Fix: Optimise frontend Postgresql plugin cache busting (#100406)

fix(postgresql): add version for optimised cache busting

(cherry picked from commit cbe5741096)

Co-authored-by: Jack Westbrook <jack.westbrook@gmail.com>

public/app/plugins/datasource/grafana-postgresql-datasource/plugin.json

@@ -14,7 +14,8 @@
     "logos": {
       "small": "img/postgresql_logo.svg",
       "large": "img/postgresql_logo.svg"
-    }
+    },
+    "version": "%VERSION%"
   },
 
   "alerting": true,