ButtonGroup: Fix button and icon button styling when tooltips are used on them

[broccolinisoup]

Closes https://github.com/primer/react/issues/4129

Changelog

New

Changed

• With this PR, we are wrapping button group items with a div. The main reason is to simplify CSS selection. You can view the previous attempt to write a CSS to fix styling issues both for tooltip v1 and v2 on button group.
• Enhanced CSS selection for the ButtonGroup children elements to ensure buttons and links still look the same if there are tooltips on them

Removed

Rollout strategy

• [x] Patch release
• [ ] Minor release
• [ ] Major release; if selected, include a written rollout or migration plan
• [ ] None; if selected, include a brief description as to why

Testing & Reviewing

Merge checklist

• [x] Added/updated tests
• [ ] Added/updated documentation
• [x] Added/updated previews (Storybook)
• [ ] Changes are SSR compatible
• [ ] Tested in Chrome
• [ ] Tested in Firefox
• [ ] Tested in Safari
• [ ] Tested in Edge
• [x] (GitHub staff only) Integration tests pass at github/github (Learn more about how to run integration tests)

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 08df44e66f2dc72568d49e7cebf4a3cd54bbe01b

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@primer/react	Patch

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[github-actions[bot]]

size-limit report 📦

Path	Size
packages/react/dist/browser.esm.js	92.49 KB (+0.09% 🔺)
packages/react/dist/browser.umd.js	92.72 KB (+0.05% 🔺)

[primer-integration[bot]]

:wave: Hi from github/github! Your integration PR is ready: https://github.com/github/github/pull/332533

[github-actions[bot]]

Hi! This pull request has been marked as stale because it has been open with no activity for 60 days. You can comment on the pull request or remove the stale label to keep it open. If you do nothing, this pull request will be closed in 7 days.

[broccolinisoup]

closing in favour of https://github.com/primer/react/pull/5123