[clang] [llvm] [HLSL] Remove `__builtin_hlsl_create_handle` (PR #109910)

[Helena Kotas via llvm-commits]

hekota wrote:

> LGTM
> 
> It's a shame we don't have a better way to review changes like this, so I'm a little uncomfortable about a commit leaving things in a transitional state, but I think my appreciation of being able to review this separately from the next step outweighs that.

Yeah, I had all of the resource codegen changes in one place, but it was huge. So I am splitting it to about 5 separate PRs for easier reviews.

https://github.com/llvm/llvm-project/pull/109910