⏪ Temporarily revert lazy polyfill web animations (ampproject#29772)

* Revert polyfill web animations lazily due to issue with FIE
* Type was wrong

♻️ Fix todo by using a WeakMap (ampproject#29749)

* Use a WeakMap as indicated by todo

* Further simplifications

* Remove unneccessary method

* Fix types

🚀 Use Lazy Loading to retrieve Web Animations Polyfill (ampproject#29708

)

* Use Lazy Loading to retrieve Web Animations Polyfill

* Fix presubmit exclusion

* Continued refinement

* Ensure users of the builder are awaiting the promise for the polyfill or native implementation

* Use Deferred from Utils

* Address PR Feedback, install polyfill once per window as needed

* Bail earlier when a polyfillPromise has been generated already per window

Ramp up ampdoc-fie experiment to 10% (5% exp, 5% control) in prod. (a…

…mpproject#29663)

(cherry picked from commit 4a241bd)

Ramp up ampdoc-fie experiment to 10% (5% exp, 5% control) in prod. (a…

…mpproject#29663)

(cherry picked from commit 4a241bd)

calcTaskTimeout: turn off experiment now that experimental data was c…

…ollected (ampproject#29602)

📖 amp-list: fix amp.dev docs syntax errors (ampproject#29554)

* 📖 amp-list: fix amp.dev docs syntax errors

* Accomodate prettier suggestions

* Enable Validation section for all formats

* Use correct white spaces

Add metrics for onResizeSuccess/onResizeDenied usage (ampproject#29533)

🧪Ramp up json targeting exp (ampproject#29518)

🐛 [amp-story] Audio bug fixes (ampproject#29515)

* audio bug fixes

* update sample

* clean up PR

* cleanup

(cherry picked from commit 420b303)