[webauthn] Move (more) nested frame tests to WPTs
Move an internal web test that verifies that WebAuthn assertions work in
a variety of same-origin frames into web-platform-tests, updating it to
work with webdriver. Remove some redundant tests.
Bug: 372169469
Change-Id: Ia75edbf5b9a0a206450095ad4c13ffd2e5c9ddf5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5916456
Commit-Queue: Nina Satragno nsatragno@chromium.org
Reviewed-by: Ken Buchanan kenrb@chromium.org
Cr-Commit-Position: refs/heads/main@{#1366197}