DataViews: vendor ValidatedToggleGroupControl

[jorgefilipecosta]

Part of #81230
Follow-up to #81391

What?

Moves ValidatedToggleGroupControl out of the @wordpress/components private APIs and into @wordpress/dataviews, its only consumer.

Why?

See #81230.

How?

The ValidatedToggleGroupControl wrapper now lives in the validated-form-controls folder of the DataViews package, where it reuses the already-vendored ControlWithError foundation and builds on the public __experimentalToggleGroupControl export instead of private APIs. The component, its story, and its private API registration are removed from the components package, and the mention of its delegate-based implementation is dropped from the overview doc. Its unit test moves along with it.

This control validates through a visually hidden "error delegate" radio input, so the delegate styles (__wrapper-with-error-delegate, __error-delegate) move into the DataViews stylesheet too, renamed from the components-validated-control namespace to dataviews-validated-control.

Testing Instructions

1. Run the unit tests: npm run test:unit -- packages/dataviews/src/components/validated-form-controls/test/
2. Optionally, start Storybook with npm run storybook:dev, open DataViews → DataForm → Validation, and verify validation on the toggle group field: submitting with no option selected shows the required error, choosing an option other than Option 1 shows the custom rule error with the red highlight on the control, and choosing Option 1 clears it.

Use of AI Tools

This PR was authored with the assistance of AI tools and reviewed by the author.

[github-actions]

Warning: Type of PR label mismatch

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• Labels found: [Package] Components, [Package] DataViews.

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[github-actions]

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Co-authored-by: jorgefilipecosta <jorgefilipecosta@git.wordpress.org>
Co-authored-by: oandregal <oandregal@git.wordpress.org>

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[github-actions]

Size Change: +282 B (0%)

Total Size: 7.71 MB

📦 View Changed

Filename	Size	Change
build/scripts/block-editor/index.min.js	459 kB	+111 B (+0.02%)
build/scripts/components/index.min.js	256 kB	-108 B (-0.04%)
build/scripts/edit-site/index.min.js	333 kB	+56 B (+0.02%)
build/scripts/editor/index.min.js	530 kB	+66 B (+0.01%)
build/scripts/media-utils/index.min.js	153 kB	+110 B (+0.07%)
build/styles/components/style-rtl.css	16.4 kB	-8 B (-0.05%)
build/styles/components/style-rtl.min.css	13.8 kB	-8 B (-0.06%)
build/styles/components/style.css	16.5 kB	-8 B (-0.05%)
build/styles/components/style.min.css	13.8 kB	-8 B (-0.06%)
build/styles/edit-site/style-rtl.css	21.7 kB	+10 B (+0.05%)
build/styles/edit-site/style-rtl.min.css	17.8 kB	+11 B (+0.06%)
build/styles/edit-site/style.css	21.7 kB	+11 B (+0.05%)
build/styles/edit-site/style.min.css	17.8 kB	+12 B (+0.07%)
build/styles/editor/style-rtl.css	31.8 kB	+8 B (+0.03%)
build/styles/editor/style-rtl.min.css	27.1 kB	+9 B (+0.03%)
build/styles/editor/style.css	31.9 kB	+9 B (+0.03%)
build/styles/editor/style.min.css	27.1 kB	+9 B (+0.03%)

_{compressed-size-action}

[github-actions]

Flaky tests detected in 63997f6.
Some tests passed with failed attempts. The failures may not be related to this commit but are still reported for visibility. See the documentation for more information.

🔍 Workflow run URL: https://github.com/WordPress/gutenberg/actions/runs/31518839054
📝 Reported tests:

three users concurrently edit a large post with diverse blocks in /test/e2e/specs/editor/collaboration/collaboration-stress.spec.ts, passed after 1 failed attempt.

TimeoutError: locator.waitFor: Timeout 17500ms exceeded.
Call log:
  - waiting for getByRole('button', { name: /Collaborators list/ }) to be visible

    at map (/home/runner/work/gutenberg/gutenberg/test/e2e/specs/editor/collaboration/fixtures/collaboration-utils.ts:192:7)
    at CollaborationUtils.waitForMutualDiscovery (/home/runner/work/gutenberg/gutenberg/test/e2e/specs/editor/collaboration/fixtures/collaboration-utils.ts:187:10)
    at /home/runner/work/gutenberg/gutenberg/test/e2e/specs/editor/collaboration/collaboration-stress.spec.ts:416:28

[oandregal]