Nav: Split Admin into three sections for new IA (#58229)

* start to split admin into two sections

* most of new admin nav implemented

* landing pages

* hide admin for non-admins

* update admin redirects if not topnav

* clean up

* updated IA for admin (still WIP)

* move plugin pages into correct admin sections

* fix backend unit test

* move correlations into the correct section

* add translations for admin sections

Co-authored-by: Ashley Harrison <ashley.harrison@grafana.com>

public/locales/en-US/grafana.json

@@ -99,6 +99,15 @@
       "subtitle": "Manage server-wide settings and access to resources such as organizations, users, and licenses",
       "title": "Server admin"
     },
+    "admin-access": {
+      "title": "Users and access"
+    },
+    "admin-general": {
+      "title": "General"
+    },
+    "admin-plugins": {
+      "title": "Plugins and data"
+    },
     "alerting": {
       "subtitle": "Learn about problems in your systems moments after they occur",
       "title": "Alerting"
@@ -184,7 +193,8 @@
     },
     "global-users": {
       "subtitle": "Manage and create users across the whole Grafana server",
-      "title": "Users"
+      "title": "Users (All orgs)",
+      "titleBeforeTopnav": "Users"
     },
     "help": {
       "title": "Help"
@@ -227,7 +237,8 @@
     },
     "org-settings": {
       "subtitle": "Manage preferences across an organization",
-      "title": "Preferences"
+      "title": "Default preferences",
+      "titleBeforeTopnav": "Preferences"
     },
     "playlists": {
       "subtitle": "Groups of dashboards that are displayed in a sequence",