[llvm] [X86][CodeGen] Add base trig intrinsic lowerings (PR #96222)

[Eli Friedman via llvm-commits]

https://github.com/efriedma-quic approved this pull request.

Didn't read carefully, but assuming the code for the new operations is doing the same thing as the code for existing operations, LGTM.

https://github.com/llvm/llvm-project/pull/96222