[llvm-branch-commits] [clang] [X86] Backport saturate-convert intrinsics renaming & YMM rounding intrinsics removal in AVX10.2 (PR #135549)

[Simon Pilgrim via llvm-branch-commits]

https://github.com/RKSimon approved this pull request.

LGTM as a C/C++ intrinsics rename only cherry pick (the builtins were additionally renamed in trunk).

https://github.com/llvm/llvm-project/pull/135549