Add the tablegen mechanism to lower intrinsics to DXIL ops with extra enum arguments.

[adam-yang]

Some DXIL ops are generic operations that take additional enums to specify the actual type of operation. Here's a quick list of operations that fit the pattern:

WaveActiveOp          _, WaveOpKind, SignedOpKind
WaveActiveBit         _, WaveBitOpKind
WavePrefixOp          _, WaveOpKind, SignedOpKind
QuadOp                _, QuadOpKind
WaveMultiPrefixOp     _, _, _, _, _, WaveMultiPrefixOpKind, SignedOpKind
QuadVote              _, _, QuadVoteOpKind
Barrier               BarrierMode

AtomicBinOp           _, AtomicBinOpCode, _, _, _, _
WaveMatrix_ScalarOp   _, WaveMatrixScalarOpCode, _

We need a tablegen solution to easily declare:

• What intrinsic should lower to this DXIL op
• What arguments should come from the original intrinsic and what order should they be
• What additional enum arguments should the specific intrinsic map to.