Variables: turns on newVariables as a new default (#23272)

* Variables: turns on newVariables as default

* Chore: adds default templating state

* Some small refactorings to get the template_srv tests to get green when toggle is enabled by default.

* Refactor: adds getVariables dependency to DashboardModel

* Tests: fixes StackDriver tests

* Tests: updates snapshots

* Tests: updates snapshot for DashboardGrid.test.tsx

* Tests: fixes DashboardModel.test.ts

* fixed initDashboard tests.

* renamed variable.

* changed so we use the templating.list when running the migration work.

* changed so we always returns the variables in sorted order.

* Tests: fixed cloudwatch tests

* added so we set the global template variable props.

* Fixed tests and added moved logic to complete templateSrv variables.

* removed unneccesary updateIndex.

Co-authored-by: Marcus Andersson <marcus.andersson@grafana.com>

public/app/plugins/datasource/stackdriver/components/VariableQueryEditor.test.tsx

@@ -11,6 +11,21 @@ jest.mock('../functions', () => ({
   extractServicesFromMetricDescriptors: (): any[] => [],
 }));
 
+jest.mock('../../../../core/config', () => {
+  console.warn('[This test uses old variable system, needs a rewrite]');
+  const original = jest.requireActual('../../../../core/config');
+  const config = original.getConfig();
+  return {
+    getConfig: () => ({
+      ...config,
+      featureToggles: {
+        ...config.featureToggles,
+        newVariables: false,
+      },
+    }),
+  };
+});
+
 const props: VariableQueryProps = {
   onChange: (query, definition) => {},
   query: {},