* Deprecate validator revisions.

PiperOrigin-RevId: 371264327

* Print base64 of validator output to conveniently replace golden test files

PiperOrigin-RevId: 371393396

* Update comments to reflect this now uses htmlparser

PiperOrigin-RevId: 371792016

Co-authored-by: Googler <noreply@google.com>
Co-authored-by: Boxiao Cao <caoboxiao@google.com>
Co-authored-by: honeybadgerdontcare <sedano@google.com>