[autofill in devtools] Add checkFormsIssues interface.

Bug: 1399414
Change-Id: If94881d1dbaf44ed91f9fbbc2f2d7b23dbb3d6a2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4517870


Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Reviewed-by: Danil Somsikov <dsv@chromium.org>
Code-Coverage: Findit <findit-for-me@appspot.gserviceaccount.com>
Reviewed-by: Florian Leimgruber <fleimgruber@google.com>
Commit-Queue: Bruno Braga <brunobraga@google.com>
Cr-Commit-Position: refs/heads/main@{#1143943}