Navigator: mark experimental exports as deprecated

[ciampo]

What?

Part of #59418

This PR marks the following exports from @wordpress/components as deprecated: __experimentalNavigatorProvider, __experimentalNavigatorScreen, __experimentalNavigatorButton, __experimentalNavigatorBackButton, __experimentalNavigatorToParentButton and __experimentalUseNavigator.

Why?

The Navigator is not exported also as a stable API. The stable export should be preferred over the __experimental one.

How?

Following the passive deprecation strategy highlighted in #61099

Testing Instructions

• Make sure there are no usages left of the deprecated components in the codebase
• Make sure that the @deprecated JSDoc tag is applied and shows as expected on the deprecated exports
• No runtime changes

[github-actions]

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Co-authored-by: ciampo <mciampini@git.wordpress.org>
Co-authored-by: tyxla <tyxla@git.wordpress.org>

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[tyxla]

Looks good, just have one question on the deprecation comments.

[tyxla]

Looks great, thanks 🚀

[github-actions]

Flaky tests detected in bd9ea19.
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/11142852428
📝 Reported issues:

• [Flaky Test] Navigates the items list via UP/DOWN arrow keys #64334 in /test/e2e/specs/site-editor/dataviews-list-layout-keyboard.spec.js