Implement GetGroupWaveIndex and GetGroupWaveCount

[JoeCitizen]

Implement Group Wave Index and Group Wave Count as proposed by:
https://github.com/microsoft/hlsl-specs/blob/main/proposals/0048-group-wave-index.md

Added two new intrinsics:

• GetGroupWaveIndex - returns the index of the wave in the thread group
• GetGroupWaveCount - returns the number of waves in the thread group

Limited to Shader Model 6.10 and Compute, Mesh, Node and Amp. shaders.

Added basic test.

[github-actions]

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[github-actions]

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[damyanp]

Could you add something to ReleaseNotes.md please?

[damyanp]

Seems to LGTM, but I'm not an expert in this area.

@tex3d - do we need to wait for #7947 to land before merging this?

[tex3d]

We have several SM 6.10 features staged in PRs now. In order to reduce conflicts, I'd like to suggest we make a separate PR reserving the HLSL Intrinsics and the experimental DXIL ops ahead of the rest of the changes.

This means a PR with just the additions to gen_intrin_main.txt, hctdb.py, nullptr , generated changes (hlsl_intrinsic_opcodes.json, DxilConstants.h, DXIL.rst, DxilInstructions.h, DxilOperations.cpp), and initial EmptyLower table entries for gLowerTable in HLOperationLower.cpp.

Of course, this will also depend on getting #7947 in first.