Update mma tests in prep for changes needed in a followup patch for https://github.com/llvm/llvm-project/issues/107229. Checks for ``clang/test/CodeGen/PowerPC/builtins-ppc-pair-mma-types.c`` seem to have been manually upated to rename temp variables even though it says checks was auto generated. Regenerate via script. Add noopt checks for ``clang/test/CodeGen/PowerPC/builtins-ppc-build-pair-mma.c``.