[clang] Mechanically port bulk of x86 builtins to TableGen (PR #120831)

[Craig Topper via cfe-commits]

topperc wrote:

When I was still involved in X86 my recollection was we primarily used LLi. It looks like there was a large replacement of LLi with Oi here fa8cd7691ac28d07f6a127ed26f0dbe49699bd59.

https://github.com/llvm/llvm-project/pull/120831