[clang] [llvm] [X86] Add ACE v1 (AI Compute Extensions) support (PR #208408)

[Arun Thangamani via llvm-commits]

arun-thmn wrote:

On top of this patch, we add the MLIR lowering pass to convert contraction operations into the corresponding `ACE` LLVM intrinsics for `outer-product` operations.

https://github.com/arun-thmn/llvm-project/tree/X86ACEV1-MLIR

https://github.com/llvm/llvm-project/pull/208408