[HIP] Allow target addr space in target builtins

This patch allows target specific addr space in target builtins for HIP. It inserts implicit addr
space cast for non-generic pointer to generic pointer in general, and inserts implicit addr
space cast for generic to non-generic for target builtin arguments only.

It is NFC for non-HIP languages.

Differential Revision: https://reviews.llvm.org/D102405