[ButtonUnstyled] Update to render as link when href or to is provided

[EduardoSCosta]

This PR resolve #32870

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

With this change, the ButtonUnstyled component renders as an a element when href or to props are present, but neither component nor components.Root are provided.

[mui-bot]

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Details of bundle changes

Generated by :no_entry_sign: dangerJS against 29ab2d698bf63560d30452a0a86962998c31d292

[michaldudak]

I resolved the conflicts caused by the recent prop renaming.

[michaldudak]

Could you please merge in the latest master? Codecov shows something weird.