Refactoring stories tests to use async/await.

[gmajoulet]

Got an improvement idea while working on #24719 (cf comment inline in that PR code) that would need this, and I got carried away...

[amp-owners-bot]

Hey @gmajoulet, these files were changed:

• extensions/amp-story/1.0/test/test-amp-story-bookend.js
• extensions/amp-story/1.0/test/test-amp-story-consent.js
• extensions/amp-story/1.0/test/test-amp-story-cta-layer.js
• extensions/amp-story/1.0/test/test-amp-story-embedded-component.js
• extensions/amp-story/1.0/test/test-amp-story-info-dialog.js
• extensions/amp-story/1.0/test/test-amp-story-media-query-service.js
• extensions/amp-story/1.0/test/test-amp-story-page.js
• extensions/amp-story/1.0/test/test-amp-story-request-service.js
• extensions/amp-story/1.0/test/test-amp-story.js
• extensions/amp-story/1.0/test/test-live-story-manager.js
• extensions/amp-story/1.0/test/test-media-tasks.js

Hey @newmuis, these files were changed:

• extensions/amp-story/1.0/test/test-amp-story-bookend.js
• extensions/amp-story/1.0/test/test-amp-story-consent.js
• extensions/amp-story/1.0/test/test-amp-story-cta-layer.js
• extensions/amp-story/1.0/test/test-amp-story-embedded-component.js
• extensions/amp-story/1.0/test/test-amp-story-info-dialog.js
• extensions/amp-story/1.0/test/test-amp-story-media-query-service.js
• extensions/amp-story/1.0/test/test-amp-story-page.js
• extensions/amp-story/1.0/test/test-amp-story-request-service.js
• extensions/amp-story/1.0/test/test-amp-story.js
• extensions/amp-story/1.0/test/test-live-story-manager.js
• extensions/amp-story/1.0/test/test-media-tasks.js

[wassgha]

Related to #24076

[Enriqe]

LGTM assuming no logic change (didn't review test-amp-story.js since it's 1.6k LOC). I also assume you used a tool to do the replace hehe. Thanks for this!

[gmajoulet]

I actually did this manually 😭😭