Fix overflow issue in ActionMenu

[strackoverflow]

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What are you trying to accomplish?

This PR updates the ActionMenu component to use the Overlay component's body slot, which will allow the menu to properly scroll its overflown contents.

Thanks @langermank for help in solving this!

Screenshots

Before	After

List the issues that this change affects.

Closes #2380

Risk Assessment

• Low risk the change is small, highly observable, and easily rolled back.
• Medium risk changes that are isolated, reduced in scope or could impact few users. The change will not impact library availability.
• High risk changes are those that could impact customers and SLOs, low or no test coverage, low observability, or slow to rollback.

What approach did you choose and why?

Originally I intended to add customizable overflow options to ActionMenu, but @langermank helpfully pointed out that we can just make use of Overlay's body slot which would give us the proper overflow behavior 🎉

I couldn't think of a good way to write a test to cover overflow behavior in ActionMenu, I'm open to suggestions!

Merge checklist

• Added/updated tests
• Added/updated documentation
• Added/updated previews (Lookbook)
• Tested in Chrome
• Tested in Firefox
• Tested in Safari
• Tested in Edge

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🦋 Changeset detected

Latest commit: a8b8ae0

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

This PR includes changesets to release 1 package

Name	Type
@primer/view-components	Patch

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[github-actions]

⚠️ Visual differences found

Our visual comparison tests found UI differences. Please review the differences by viewing the files changed tab to ensure that the changes were intentional.

Review visual differences

[langermank]

I couldn't think of a good way to write a test to cover overflow behavior in ActionMenu, I'm open to suggestions!

Only thing I can think of is to write a new preview with a max height set and the menu open. Then we can pickup a screenshot of it through snapshot testing. I think that could be a followup later though!

[langermank]

Nice!

[keithamus]

Given this is a visual change it might be nice to add a snapshot to test the overflow bug.

Adding @snapshot interactive to an appropriate preview should be all you need.

Other than that this LGTM

[jonrohan]

Looks good 👍🏻