[libclc] [libclc] Add v3 variants of async_work_group_copy/async_work_group_strided_copy/prefetch (PR #137932)

[Wenju He via cfe-commits]

wenju-he wrote:

> We could probably come up with some kind of combined `gentype.inc` that does them both at once 

good idea.


https://github.com/llvm/llvm-project/pull/137932