Plugins: Automatic service account (and token) setup (#76473)

* Update cue to have an AuthProvider entry

* Cable the new auth provider

* Add feature flag check to the accesscontrol service

* Fix test

* Change the structure of externalServiceRegistration (#76673)

pkg/plugins/manager/testdata/external-registration/plugin.json

@@ -18,24 +18,11 @@
     "version": "1.0.0"
   },
   "externalServiceRegistration": {
-    "impersonation": {
-      "enabled" : true,
-      "groups" : true,
-      "permissions" :  [
-        {
-          "action": "read",
-          "scope": "datasource"
-        }
-      ]
-    },
-    "self": {
-      "enabled" : true,
-      "permissions" :  [
-        {
-          "action": "read",
-          "scope": "datasource"
-        }
-      ]
-    }
+    "permissions" :  [
+      {
+        "action": "read",
+        "scope": "datasource"
+      }
+    ]
   }
 }

pkg/plugins/manager/testdata/oauth-external-registration/plugin.json

@@ -0,0 +1,38 @@
+{
+  "id": "grafana-test-datasource",
+  "type": "datasource",
+  "name": "Test",
+  "backend": true,
+  "executable": "gpx_test_datasource",
+  "info": {
+    "author": {
+      "name": "Grafana Labs",
+      "url": "https://grafana.com"
+    },
+    "logos": {
+      "large": "img/ds.svg",
+      "small": "img/ds.svg"
+    },
+    "screenshots": [],
+    "updated": "2023-08-03",
+    "version": "1.0.0"
+  },
+  "externalServiceRegistration": {
+    "impersonation": {
+      "enabled" : true,
+      "groups" : true,
+      "permissions" :  [
+        {
+          "action": "read",
+          "scope": "datasource"
+        }
+      ]
+    },
+    "permissions" :  [
+      {
+        "action": "read",
+        "scope": "datasource"
+      }
+    ]
+  }
+}