[SwitchUnstyled] Integrate with FormControlUnstyled

[michaldudak]

Make SwitchUnstyled aware of the FormControlUnstyled context, similarly to how Material UI's Switch interacts with FormControl.

[EduardoSCosta]

Hi, I'd like to do this issue :smiley:

[michaldudak]

Hi. It requires #34414 to be completed first (or adding a second parameter, newValue, to all inputs' onChange events), so that FormControlUnstyled is able is figure out the new value after it changes.