[CL-301] Enable Storybook test runner. Run a11y tests also (#14646)

* Enable Storybook test runner. Run a11y tests also

* no need to return checkA11y function

* add back decorator removed in error

* add test runner to our ownership

* add axe-playwright to our ownership

.github/renovate.json5

@@ -312,6 +312,7 @@
         "@angular/platform-browser",
         "@angular/platform",
         "@angular/router",
+        "axe-playwright",
         "@compodoc/compodoc",
         "@ng-select/ng-select",
         "@storybook/addon-a11y",
@@ -320,6 +321,7 @@
         "@storybook/addon-essentials",
         "@storybook/addon-interactions",
         "@storybook/addon-links",
+        "@storybook/test-runner",
         "@storybook/addon-themes",
         "@storybook/angular",
         "@storybook/manager-api",