[HLSL] Rewrite HLSL alias intrinsics into TableGen (#188814)
This PR will close issue
https://github.com/llvm/llvm-project/issues/188345 after PR
https://github.com/llvm/llvm-project/pull/188362.
This PR rewrites all applicable alias intrinsics from
`hlsl_alias_intrinsics.h` into TableGen (`HLSLIntrinsics.td`).
There are no significant test changes with this PR.
The generated `hlsl_alias_intrinsics_gen.h` can be seen here:
https://gist.github.com/Icohedron/5b9ed2638da0966e3c7514dcb5095197
The generated `hlsl_inline_intrinsics_gen.h` is the same as in
https://github.com/llvm/llvm-project/pull/188362 since this PR does not
add or modify any inline intrinsics definitions.
Assisted-by: GitHub Copilot