fix(SelectPanel2): only bind keydown event when necessary

[bwittenberg]

Closes #4581

Changelog

New

• Adds additional jest test coverage for the SelectPanel

Changed

• Adds optimization to SelectPanel so that event listeners are not added and removed on each render, but only when the effect dependencies change.

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

• One of the SelectPanel jest test should fail if changes to SelectPanel are reverted.
• RT1: Regression Test 1: Panel should close when opened and escape is pressed
  • Visit the SelectPanel in storybook (http:///?path=/story/drafts-components-selectpanel--default)
  • Click the button, assert panel opens
  • Press the Escape key on the keyboard, assert panel closes

Merge checklist

• [x] Added/updated tests ~- [ ] Added/updated documentation~ ~- [ ] Added/updated previews (Storybook)~
• [ ] Changes are SSR compatible
  • I'm not sure about this one. Because hooks with dependencies are in use already, this code change shouldn't introduce any issues. I didn't test though, which is why I'm not checking this box.
• [x] Tested in Chrome (ran RT1 above on Chrome 124.0.6367.207)
• [x] Tested in Firefox (ran RT1 above on Firefox 126.0)
• [x] Tested in Safari (ran RT1 on Safari 17.4.1)
• [x] Tested in Edge (ran RT1 on Edge 124.0.2478.105)
• [ ] (GitHub staff only) Integration tests pass at github/github (Learn more about how to run integration tests)

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: f332218ed8bc772b4e15d53959a2c66df7fb7e46

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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[bwittenberg]

Hello @broccolinisoup! Appreciate the 👀. If you'd like to see any changes, I'm happy to make revisions.