Accessibility: Add storybook a11y tests that run in CI (#108543)

* add test runner and start experimenting with storybook a11y tests

* skip currently failing a11y tests

* first attempt at github action

* fix CODEOWNERS, fix copy assets

* no caching?

* make wait-on better

* increase timeout and add verbose logging

* kick CI

* remove verbose logging, try different runner

* remove commented out code in copyAssets

* try maxWorkers 2

* turn on verbose logging, run as part of same step

* test storybook verify

* try setting LANG

* tidy up

* add betterer test

packages/grafana-alerting/src/grafana/contactPoints/components/ContactPointSelector/ContactPointSelector.story.tsx

@@ -14,6 +14,8 @@ const meta: Meta<typeof ContactPointSelector> = {
     docs: {
       page: mdx,
     },
+    // TODO fix a11y issue in story and remove this
+    a11y: { test: 'off' },
   },
 };