Hard deprecate codepaths where tidy is disabled

Future parsers will not support the output generated with tidy disabled.

Parser tests using untidied output will also be deprecated (and
rewritten) in a follow-up patch.

No new release notes necessary since user-visible tidy configuration
was deprecated previously (in 1.32), and individual methods which had
disabled tidy during execution were individually release-noted as they
were updated.

Bug: T198214
Depends-On: I0f417f75a49dfea873e9a2f44d81796a48b9f428
Depends-On: If5c619cdd3e7f786687cfc2ca166074d9197ca11
Change-Id: I592e0e0dfef7d929f05c60ffe4d60e09725b39cc