E2E: Adds tests for QueryVariable CRUD (#20448)

* WIP: Adds basic template variables CRUD start

* e2eTests: Adds aria-labels in VariableEditorCtrl

* Refactor: Simplifies a bit

* e2eTests: Adds first Template Variable CRUD for QueryVariable

* Tests: Adds ArrayPageOjbectType

* Tests: Adds createQueryVariable method

* Tests: Refactor CRUD test

* Tests: Adds datasource and dashboard to scenario

* Refactor: Fixes type errors

* Refactor: Move pages to toolkit

public/app/core/components/EmptyListCTA/EmptyListCTA.tsx

@@ -1,6 +1,7 @@
-import React, { useContext, MouseEvent } from 'react';
+import React, { MouseEvent, useContext } from 'react';
 import { CallToActionCard, LinkButton, ThemeContext } from '@grafana/ui';
 import { css } from 'emotion';
+
 export interface Props {
   title: string;
   buttonIcon: string;
@@ -72,7 +73,14 @@ const EmptyListCTA: React.FunctionComponent<Props> = ({
     : '';
 
   const ctaElement = (
-    <LinkButton size="lg" onClick={onClick} href={buttonLink} icon={buttonIcon} className={ctaElementClassName}>
+    <LinkButton
+      size="lg"
+      onClick={onClick}
+      href={buttonLink}
+      icon={buttonIcon}
+      className={ctaElementClassName}
+      aria-label={`Call to action button ${buttonTitle}`}
+    >
       {buttonTitle}
     </LinkButton>
   );