Fix dialogs causing scroll

[keithamus]

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What are you trying to accomplish?

Some dialogs will scroll due to the bounds of their content being greater than the height of the dialog. This is not desirable, as there is an interior scroll container within the dialog.

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• Added/updated tests
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• Tested in Chrome
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[changeset-bot]

🦋 Changeset detected

Latest commit: 37f5157

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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[jonrohan]

Tested this on pull request review overlay and it's got some issues