[SM6.10][Exec][Bugfix] Add matrix layout conversion helpers, post-execute command list callback, and re-enable OuterProduct test

[Icohedron]

Addresses the matrix layout conversion requirement of issue #8386

This PR re-enables the OuterProduct smoke test and adds support for matrix layout conversions via new dedicated helper functions in HLSLExecTestUtils.h/.cpp and a new post-execute command list callback in ShaderOpTest.h/.cpp.

• New helper functions getLinAlgMatrixByteSize, recordLinAlgMatrixConversion, and toLinAlgDataType for querying matrix byte sizes, recording a matrix layout conversion operation to a command list, and converting DXIL component type enums into D3D12 LinAlg datatype enums
• A new post-execute command list callback is introduced for allowing tests to record commands that run after a dispatch/draw. A separate DIRECT command list is created that runs after the command list containing the dispatch/draw call
  • The rationale for this is that COMPUTE command lists are not allowed to execute the ConvertLinearAlgebraMatrix command. Instead of converting the COMPUTE command list into a DIRECT command list, I opted to create a separate DIRECT command list that runs after the COMPUTE command list to perform the matrix layout conversion. If it is preferrable to simply change the COMPUTE command list into a DIRECT command list and append the ConvertLinearAlgebraMatrix after the dispatch, I am not opposed to it and can change it per reviewers' requests. I am not sure which is the better solution here
• Re-enable the OuterProduct smoke test with changes made to use the outer-product-optimal layout and uses the new helpers and callback to convert the output back into row-major order for validation

Assisted by: Claude Opus 4.8

[bob80905]

Maybe I'm wrong, but I see you using GetResource on the "Output" buffer, in the code below. Doesn't that mean that this ReadBack bool should remain true?

[Icohedron]

The "Output" buffer is not being read by the CPU, so the ReadBack bool is false. The "Output" buffer is also in the opaque outer-product-optimal layout, so we shouldn't even try to interpret it without first converting it to a layout we do know how to read.

The GetResource just obtains a handle to be able to refer to the "Output" buffer so that we can record a ConvertLinearAlgebraMatrix command into the command list to tell the GPU to convert it into row-major order and store it into "OutputRowMajor", which the CPU does read back.