Update button activation behaviours

This change does a few things to align with the latest spec, based on
the changes in whatwg/html#11053.

- Reset buttons should _only_ reset the form, not trigger additional
  popover or command behaviours.
- Buttons should reflect "button" when command/commandfor attributes
  are present, with or without a form-owner.
- Buttons that reflect "button" with command/commandfor attributes
  that have a form-owner should be no-op; this is a restriction for
  back-compat that will eventually be lifted.
  whatwg/html#10832 tracks the state of
  this, and consequently I've added a UseCounter to help figure out
  when it is safe to make this change.

Bug: 399124617
Change-Id: I684371bb7fc8e0888bcf0713caff212f4806a7c4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6304979
Commit-Queue: Keith Cirkel <chromium@keithcirkel.co.uk>
Reviewed-by: Mason Freed <masonf@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1425642}

Author: WeizhongX