[Unity] Also include output dtype in simt MathInstruction

[areusch]

Fixes a bug where this stacktrace is generated:

  File "/opt/scorecard/relax/python/tvm/contrib/cutlass/gen_tensor_op.py", line 189, in generate_sm75_tensor_op_1688
    return generate_sm50_simt(
  File "/opt/scorecard/relax/python/tvm/contrib/cutlass/gen_tensor_op.py", line 119, in generate_sm50_simt
    return generate_tensor_op_common(
  File "/opt/scorecard/relax/python/tvm/contrib/cutlass/gen_tensor_op.py", line 71, in generate_tensor_op_common
    out = op_creator(tile_descriptions, data_type, alignment_constraints)
  File "/opt/scorecard/relax/python/tvm/contrib/cutlass/gen_gemm.py", line 151, in enumerate_gemm_operators
    op.procedural_name(),
  File "/opt/scorecard/relax/python/tvm/contrib/cutlass/gemm_operation.py", line 110, in procedural_name
    opcode_class_name = OpcodeClassNames[self.tile_description.math_instruction.opcode_class]
KeyError: <MathOperation.multiply_add: 1>

@masahi @jwfromm

[tvm-bot]

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• cc @quic-sanirudh _{See #10317 for details}

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