[Suggestion] - add contrast property to textArea component

[ValbertMartins]

• Using forms with TextInput(using contrast) and TextArea components together

<>
 <FormControl>
 <FormControl.Label>Name</FormControl.Label>
 <TextInput block contrast />
 </FormControl>

 <FormControl>
 <FormControl.Label>Name</FormControl.Label>
 <TextInput block contrast />
 </FormControl>
 
 <FormControl>
 <FormControl.Label>About</FormControl.Label>
 <Textarea block />
 </FormControl>
</>

• result in diferents background colors

• actually the way to fix

<FormControl>
 <FormControl.Label>About</FormControl.Label>
 <Textarea block sx={{ backgroundColor: 'canvas.inset' }} /> 👈
</FormControl>

• Maybe a better way introduced in this pr #3484

<FormControl>
 <FormControl.Label>About</FormControl.Label>
 <Textarea block contrast/> 👈/* using contrast instead sx * /
</FormControl>

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[mperrotti]

I think we might get rid of the contrast style. I'm going to ask about this in next week's Primer patterns working session.

If we are getting rid of contrast, we should deprecate and remove it from all form controls.
If we're not getting rid of contrast, I agree that Textarea should support it.

[lesliecdubs]

I think we might get rid of the contrast style. I'm going to ask about this in next week's Primer patterns working session.

@mperrotti do you know whether it was decided to keep the contrast style? If so, we should consider reviewing and merging #3484. If not, it'd be great to close these out.

[lesliecdubs]

@langermank suggests we should just add this because the contrast property is so pervasive in its current form. @mperrotti let us know if you have concerns, otherwise we'll move ahead.