Import wpt@edaaf33ebd47fd613ec8aa12b393078a68fbc3a5

Using wpt-import in Chromium 817afc8a.
With Chromium commits locally applied on WPT:
661771ae "URLPattern: Escape pattern baseURL values."


Note to sheriffs: 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:
igrigorik@chromium.org, yoavweiss@chromium.org:
  external/wpt/preload
mustaq@chromium.org:
  external/wpt/html/user-activation
nzolghadr@chromium.org, mustaq@chromium.org:
  external/wpt/pointerevents
rego@igalia.com:
  external/wpt/css/css-contain
  external/wpt/css/css-grid

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

No-Export: true
Cq-Include-Trybots: luci.chromium.try:linux-wpt-identity-fyi-rel,linux-wpt-input-fyi-rel,linux-blink-rel
Change-Id: I02139fc5c7cf7fcaab12d17533cb397968279292
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4027549
Auto-Submit: WPT Autoroller <wpt-autoroller@chops-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#1072129}