Release 4.2143.0
[DNM] React 19 (#12374)
* Testing
* cache
* cache
* Update @types/react
* Update dependabot.yml
* Update Emotion to support React 19 types
* run yarn dedupe
* Type fixes
* viewRef updates
* more viewRef fixes
* more viewRef updates
* Try React.JSX
namespace for type declaration files
* Update bundleSizeConfig.js
* Update index.jsx
* cache
* cache
* Syntax and test fixes
* Update index.tsx
* Update component.test.jsx.snap
* Disable AMP boilerplate test temporarily
* Update client.js
* Update client.js
* Try retries for Chartbeat timeouts
* Revert "Try retries for Chartbeat timeouts"
This reverts commit eb78848.
* Force reload of window for Chartbeat script tests
* Test with retries on Chartbeat e2e
* Remove eslint ignores for imagesrcset
and imageSizes
* AMP boilerplate test refactor
* Missed file
* Remove fetchpriority
from eslint ignore
* Update bundleSizeConfig.js