Import wpt@4700530dc10dbf39146268e709700a3cd655e0d5

Using wpt-import in Chromium 7c24777e.
With Chromium commits locally applied on WPT:
7eed88d6 "Update popup-redirect-cache.https.html to use dispatcher"
a693cb86 "Ensure that sends to each uuid occur in order."


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:
eae@chromium.org, szager@chromium.org:
  external/wpt/intersection-observer

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: I5cf200fa9eb62882a938c15167be0a942d6fee11
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3891896
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@{#1046030}