[Sanitizer] Re-enable testcases, and convert testcases.sub.js.
This re-enables testcases in virtual/sanitizer-api/. We currently pass
very few of these tests. The intention is that we can use these tests
as a TODO list as the implementation progresses.
This also converts the old testcases.sub.js logic to the newer (and
more precise) HTML5lib-based testcase format.
Bug: 356601280
Change-Id: I340253cd8ce4e629392e0943b581f313309a4b73
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5974696
Reviewed-by: Yifan Luo lyf@chromium.org
Commit-Queue: Daniel Vogelheim vogelheim@chromium.org
Cr-Commit-Position: refs/heads/main@{#1377546}