[X86] Invalid fp16 comparison fix (#160304)
Missing `VCMPPHZrrik`, `VCMPPHZ128rrik`, and `VCMPPHZ256rrik` opcodes in
`commuteInstructionImpl` and `findCommutedOpIndices` led to improper
handling of compare instruction during optimization. Operands were
commuted, but swapping of the immediate was not called.
Fixes: #159723
