Remove our UseAsPressable implementation, use the one from core

[Saadnajmi]

https://github.com/microsoft/fluentui-react-native/tree/master/packages/utils/interactive-hooks/src/Pressability

Before RN-Core made Pressable public, we copied the source code of Pressable into FURN and converted it to typescript so we can use it. Now that everything is on RN 0.63, we should delete this.

A caveat. Maybe we should wait till everything downstream is also RN 0.63.

I bring this up because some of our automated Dep bumps fails due to an error In our Pressable copy-pasta, specifically the @types/react bumps.

@JasonVMo as an FYI. I talked about it with him when we updated the repo to RN 0.63, but I didn't end up merging it.

[Saadnajmi]

Gonna just tag some people on CXE who actually know / have used the "UseAsPressable" hooks to get their thoughts on it

@samuelfreiberg @ksiler @rurikoaraki

[Saadnajmi]

^ Linked #1868 to say we should upstream the change "onPress sets onAccesssibilityTap"