Import wpt@2a35cc1884e676c86ff094e0a3bea0fd68c7881b

Using wpt-import in Chromium bb0906ef.
With Chromium commits locally applied on WPT:
b987e8fd "Implement container-progress() function"
ca785e88 "[bfcache] Report null when iframes' atrributes are null"
76e5e949 "Revert "css-text: Fix an issue on justification with a bidi isolate control""
4b6caa33 "Use typed promises/resolvers for ReadableStream and related classes"



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

NOAUTOREVERT=true

No-Export: true
Validate-Test-Flakiness: skip
Cq-Include-Trybots: luci.chromium.try:linux-blink-rel
Change-Id: Idb3a90c282d7d5e401aee62118af5954fad501ca
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5408152


Commit-Queue: Jonathan Lee <jonathanjlee@google.com>
Reviewed-by: Jonathan Lee <jonathanjlee@google.com>
Cr-Commit-Position: refs/heads/main@{#1280432}