Fix getBoundingClientRect polyfill (ampproject#21026)

`getBoundingClientRect` is called with an element as its `this` context,
not as a parameter.

✨Add wildcard domain matching for linker (ampproject#20976)

* add wildcard

* types and lint

* more tests

* move tests

Fix regex to detect ad type (ampproject#20899)

* fix regex

* nit

Revert "Force the subscriptions dialog into the fixed layer to avoid …

…collisions with border" (ampproject#20876)

* Revert "Force the subscriptions dialog into the fixed layer to avoid collisions with border"

* lints

amp-list-load-more bugfixes (ampproject#20871)

* Adjust for no load-more initially case

* Add amp-bind to infinite-scroll demo

* Avoid null access when container is empty

* Fix type check

Add support for setting the slide via an attribute. (ampproject#20820)

- Remove logic to scroll to the current slide in `updateUi`,
`resetScrollReferencePoint_` already handles it.
- Pass the initial index into the carousel.
- Stringify mutated attribute values, the rest of the logic relies on the
values being strings.
- Refactor the responsive attributes logic to allow getting the matching
value as a one-off.
- Guard against `NaN` for the `goToSlide` method.

replace common signal CHANGE_SIZE_END with a change size event. (ampp…

…roject#20728)

Revert "Enables layers in canary (ampproject#20512)" (ampproject#20699)

This reverts commit 3946427.

Create ads/google/a4a/shared/ directory (ampproject#20620)

This is intended to make <amp-ad type=adsense> and
<amp-ad type=doubleclick> code easier to maintain going forward by
keeping it in sync with proprietary Google code located elsewhere that
hits the same endpoints.

Revert "🐛async-input: Fixed NonXHR GET on amp-form with Async Input E…

…lements (ampproject#20362)" (ampproject#20601)

This reverts commit de0ea8e.