Remove live region from FormControl validation

[TylerJDev]

Unblocks: https://github.com/github/accessibility-audits/issues/6883, https://github.com/github/accessibility-audits/issues/6881, https://github.com/github/accessibility-audits/issues/5728

We've received feedback from the Accessibility team that it may be less than ideal for the FormControl component to have a live region for validation, as the aria-describedby should suffice in most scenarios. Consumers of this component may still provide a live region, but it will no longer be included by default.

Changelog

Removed

• Removes aria-live from FormControl.Validation

Rollout strategy

• 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

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

[changeset-bot]

🦋 Changeset detected

Latest commit: 0a1dcb2

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]

size-limit report 📦

Path	Size
packages/react/dist/browser.esm.js	90.95 KB (-0.03% 🔽)
packages/react/dist/browser.umd.js	91.35 KB (+0.11% 🔺)

[TylerJDev]

This removes the live region from FormControl.Validation completely, but I think it might be worth in the future to revisit and see how, or even if we'd want to make this opt-in utilizing @primer/live-region-element. At the very least we can add an example of a custom implementation of a live region + validation if decide this is a pattern that could be used accessibly.