[checkbox][switch][radio] Add automatic aria-labelledby support

[atomiks]

• I have followed (at least) the PR section of the contributing guide.

Adds the changes from #4126 without new APIs.

Checkbox, Switch, and Radio receive aria-labelledby after hydration for non-nativeButton roots and native <label> elements.

<Field.Label> already links post-hydration as well, and adding support for SSR is non-trivial as it can leave dangling aria-labelledby refs that don't point to a label element if the label is not rendered somewhere. It's possible to warn, but might be breaking — left it to a different PR

Fixes #4122

[pkg-pr-new]

• base-ui-tanstack-start

• vite-css-base-ui-example

  pnpm add https://pkg.pr.new/@base-ui/react@4142
  

  pnpm add https://pkg.pr.new/@base-ui/utils@4142
  

commit: 86dd78f

[mui-bot]

Bundle size report

Bundle	Parsed size	Gzip size
@base-ui/react	🔺+564B(+0.12%)	🔺+278B(+0.19%)

Details of bundle changes

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[mj12albert]

Looks good ~