Import wpt@136d33babec7af1242bb6623c957034c9205bc04

https://github.com/web-platform-tests/wpt/compare/7b8cf4a0b...136d33bab

Using wpt-import in Chromium 8af789a3ace2dd3e48f740f65e9cccb5bbaa9920.
With Chromium commits locally applied on WPT:
  830f9cf847 "[anchor] Keep anchored elements within their [...]
  415a9b9632 "[anchor] Lay out an OOF with anchors before [...]
  613d65b51f "[anchor] Convert 3 multicol tests to reftests."
  cd697b8748 "[INTEROP 2025] Add fuzzy diff to backdrop-filter- [...]
  669063d998 "[fetch-later] Promote fetch-later wpt tests and fix [...]
  19b956f5c5 "Split RTCDataChannel-send-close.html web test to [...]
  e5bb00c363 "[fetch-later] Fix quota allocation for sandbox iframes."
  7d9e0e1cba "[CSP] Add WPT for CSP in image document"
  de6ea45fba "[CodeHealth] Refactor [...]

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

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: I743807ea929a2641ee6c4fdac000ff21c7054e64
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6934596
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@{#1514041}