[Alerting] - Display scenes using SceneAppPage for caching (#74767)

* Display scenes using SceneAppPage for caching

Also, reorganizing them in different tabs per Torkel's suggestion

* Fix lint

* Alerting home app poc

* Fix imports

* fix routing

* remove width

* Apply feature flags back

* Add comment regarding enabling the rule group query variable

* Upgrade scenes lib

* Add query variables back

---------

Co-authored-by: Torkel Ödegaard <torkel@grafana.com>

yarn.lock

@@ -4010,9 +4010,9 @@ __metadata:
   languageName: unknown
   linkType: soft
 
-"@grafana/scenes@npm:^1.1.1":
-  version: 1.1.1
-  resolution: "@grafana/scenes@npm:1.1.1"
+"@grafana/scenes@npm:^1.3.1":
+  version: 1.3.1
+  resolution: "@grafana/scenes@npm:1.3.1"
   dependencies:
     "@grafana/e2e-selectors": 10.0.2
     react-grid-layout: 1.3.4
@@ -4024,7 +4024,7 @@ __metadata:
     "@grafana/runtime": 10.0.3
     "@grafana/schema": 10.0.3
     "@grafana/ui": 10.0.3
-  checksum: 6405998a40e38f088443f5d4b1f5ea1f73e5bc0d08216e4aaccf8ff0b68ec4c3d691430857f357d3eed335dee0dc2e24c41c5c2f286fc7fdd32375382ad3eafe
+  checksum: fe348e4eaaa3604d0d1ec745b14ae1c0752ce1aa481e5f05a10cdf9392448386e600c2a94f2ae23af83f59daf34cd11fb7a336da863b8624b98c8d3c2732b3c3
   languageName: node
   linkType: hard
 
@@ -19702,7 +19702,7 @@ __metadata:
     "@grafana/lezer-traceql": 0.0.6
     "@grafana/monaco-logql": ^0.0.7
     "@grafana/runtime": "workspace:*"
-    "@grafana/scenes": ^1.1.1
+    "@grafana/scenes": ^1.3.1
     "@grafana/schema": "workspace:*"
     "@grafana/tsconfig": ^1.3.0-rc1
     "@grafana/ui": "workspace:*"