Revert the Button's disabled state

[connor-baer]

Purpose

#2299 improved the behavior of disabled Buttons. The disabled attribute was replaced with the aria-disabled attribute, which enabled the disabled element to receive focus and be perceived by screenreader users.

This is a breaking change since it requires developers to update unit tests that were validating the Button's disabled state using Testing Library's .toBeDisabled() matcher.

We'd like to roll out the new button design in a minor version, so we've decided to postpone this functional change until the next major.

The other potentially major changes were found to be non-breaking, so we're able to include them in a minor release.

Approach and changes

• Re-add the disabled attribute and pointer-events: none style to Buttons
• Downgrade non-breaking major changesets to minor

Definition of done

• Development completed
• Reviewers assigned
• Unit and integration tests
• Meets minimum browser support
• Meets accessibility requirements

[changeset-bot]

⚠️ No Changeset found

Latest commit: 956fae1

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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Name	Status	Preview	Updated (UTC)
oss-circuit-ui	✅ Ready (Inspect)	Visit Preview	Dec 12, 2023 10:15am

[codecov]

Codecov Report

Merging #2340 (956fae1) into canary (ef5ed0a) will decrease coverage by 0.02%.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##           canary    #2340      +/-   ##
==========================================
- Coverage   96.97%   96.95%   -0.02%     
==========================================
  Files         252      252              
  Lines       20274    20278       +4     
  Branches     1263     1263              
==========================================
  Hits        19661    19661              
- Misses        600      604       +4     
  Partials       13       13              

Files	Coverage Δ
packages/circuit-ui/components/Button/shared.tsx	90.98% <100.00%> (-1.52%)	⬇️