Import wpt@9acac680966804bdf62aae74afdbcef6020cf297

https://github.com/web-platform-tests/wpt/compare/1b9332c3c...9acac6809

Using wpt-import in Chromium 7076ce45ac441b046deb7c59f694d254829d3cef.
With Chromium commits locally applied on WPT:
  f18d9ddb57 "[WPT] fix feature/privacy-policy-frame-policy-timing"

Note to gardeners: This CL imports external tests and adds expectations
for those tests; if this CL is large and causes a few new failures,
please fix the failures by adding new lines to TestExpectations rather
than reverting. See:
https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md

Directory owners for changes in this CL:
bokan@chromium.org:
  external/wpt/scroll-to-text-fragment
dtapuska@chromium.org:
  external/wpt/uievents
eae@chromium.org, szager@chromium.org:
  external/wpt/intersection-observer
nzolghadr@chromium.org, mustaq@chromium.org:
  external/wpt/pointerevents

NOAUTOREVERT=true
R=rubber-stamper@appspot.gserviceaccount.com

No-Export: true
Validate-Test-Flakiness: skip
Cq-Include-Trybots: luci.chromium.try:linux-blink-rel
Change-Id: I2c6f583710b335ad04e465eec1e641e8daa02b6e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5540290
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Auto-Submit: WPT Autoroller <wpt-autoroller@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#1301040}