Add Arc Resources to Azure view (#9271)

* Initial work

* Add setting change handler

* Fix tests

* Update loc names and add preview tag

* Remove TODOs

extensions/azurecore/package.json

@@ -41,6 +41,17 @@
             "description": "%config.enablePublicCloudDescription%"
           }
         }
+      },
+      {
+        "type": "object",
+        "title": "Azure",
+        "properties": {
+          "azure.enableArcFeatures": {
+            "type": "boolean",
+            "default": false,
+            "description": "%config.enableArcFeatures%"
+          }
+        }
       }
     ],
     "account-type": [