[Textarea] improve endAdornment positionning

[seedy]

Description

When Textarea's content overflows horizontally, the endAdornment is not well positionned

[paulocfjunior]

I'm sorry, I'm not sure to get the use case for this change, would you mind providing an example where it results in bad responsiveness that would be fixed this way?
(I've played with the Textarea + EndAdornment and wasn't able to make it behave unexpectedly)

[seedy]

@paulocfjunior I'm on it

[seedy]

@paulocfjunior I created a draft PR showing the problematic layout.

I think this is really an edge scenario for now.

In case we want to address this layout issue, I think we could give a try to the ScrollArea primitive.

I tried it very succinctly and didn't succeed to make it work as I wanted.

Until we have a need for this enhancement, I'd deprioritize it.

WDYT?