Improve codegen for AVX-512 comparisons and general handling of `TYP_MASK` (#87089)

Improve codegen for AVX-512 comparisons and general handling of `TYP_MASK` (#87089)

* Add the various base kmask instructions

* Updating lowering to better handle the AVX512 comparisons that produce a mask

* Remove INS_Flags_IsMskSrcSrcEvexInstruction as its the same as INS_Flags_IsDstDstSrcAVXInstruction

* Save 1-byte on the encoding for CompareEqualMask and signed CompareGreaterThanMask

* Apply formatting patch

* Ensure kmovd is encoded correctly and kmov is disassembled correctly

* Ensure vpcmpgtq is actually handled

* Fix the definition of a couple kmask instructions

* Ensure gtNewSimdCmpOpAll node creates correct IR for simdSize == 64

* Add , that were dropped when resolving merge

* Ensure that the new hwintrinsiclistxarch entries don't assert ValueNum