Plugins: Angular deprecation: Detect Angular plugins and expose in API (#66824)

* Plugins: Angular deprecation: Detect Angular plugins and expose in API

* Plugins: Angular detector: Close module.js

* Plugins: Angular detector: consistent error messages

* Plugins: Angular detector: Add test for missing module.js

* Plugins: Angular detector: Fix integration tests

* Plugins: Angular detector: Changed Angular detection patterns

* Moved inMemoryFS to test_utils.go

* Add different angular detectors

* Plugins: Update plugins/data/expectedListResp.json

* Plugins: Rename angular property to angularDetected

* Plugins: Rename angular to angularDetected in Plugin and PluginDTO

* Plugins: Add angularDetected to datasources, apps and plugins frontendsettings

* Plugins: Add test for AngularDetected frontend settings

pkg/api/frontendsettings_test.go

@@ -280,6 +280,41 @@ func TestHTTPServer_GetFrontendSettings_apps(t *testing.T) {
 				},
 			},
 		},
+		{
+			desc: "angular app plugin",
+			pluginStore: func() plugins.Store {
+				return &plugins.FakePluginStore{
+					PluginList: []plugins.PluginDTO{
+						{
+							Module: fmt.Sprintf("/%s/module.js", "test-app"),
+							JSONData: plugins.JSONData{
+								ID:      "test-app",
+								Info:    plugins.Info{Version: "0.5.0"},
+								Type:    plugins.App,
+								Preload: true,
+							},
+							AngularDetected: true,
+						},
+					},
+				}
+			},
+			pluginSettings: func() pluginsettings.Service {
+				return &pluginsettings.FakePluginSettings{
+					Plugins: newAppSettings("test-app", true),
+				}
+			},
+			expected: settings{
+				Apps: map[string]*plugins.AppDTO{
+					"test-app": {
+						ID:              "test-app",
+						Preload:         true,
+						Path:            "/test-app/module.js",
+						Version:         "0.5.0",
+						AngularDetected: true,
+					},
+				},
+			},
+		},
 	}
 
 	for _, test := range tests {