[Inductor][CUTLASS] Copy cutlass_mock_imports directory

[Aidyn-A]

Pip wheels of PyTorch nightly and 2.8 release candidates do not contain cutlass_mock_imports.

This is the path to the source code:

root@8120d02fd9c5:$ tree ./torch/_inductor/codegen/cuda/cutlass_lib_extensions/ 
./torch/_inductor/codegen/cuda/cutlass_lib_extensions/
├── cutlass_mock_imports
│   ├── cuda
│   │   ├── __init__.py
│   │   ├── cuda.py
│   │   └── cudart.py
│   ├── pydot
│   │   └── __init__.py
│   └── scipy
│       ├── __init__.py
│       └── special.py
├── evt_extensions.py
└── gemm_operation_extensions.py

5 directories, 8 files

And this what installed wheel has:

root@8120d02fd9c5:$ tree /usr/local/lib/python3.12/dist-packages/torch/_inductor/codegen/cuda/cutlass_lib_extensions/
/usr/local/lib/python3.12/dist-packages/torch/_inductor/codegen/cuda/cutlass_lib_extensions/
├── __init__.py
├── evt_extensions.py
└── gemm_operation_extensions.py

1 directory, 3 files

cc @voznesenskym @penguinwu @EikanWang @jgong5 @Guobing-Chen @XiaobingSuper @zhuhaozhe @blzheng @wenzhe-nrv @jiayisunx @ipiszy @chenyang78 @kadeng @muchulee8 @amjames @chauhang @aakhundov @coconutruben

[pytorch-bot]

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🧪 See artifacts and rendered test results at hud.pytorch.org/pr/159724

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As of commit aa36b79 with merge base 03b254e ():
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[Aidyn-A]

@mlazos, @eellison, @henrylhtsang may I have your review please?

[henrylhtsang]

@pytorchbot rebase -b main

[pytorchmergebot]

@pytorchbot started a rebase job onto refs/remotes/origin/main. Check the current status here

[pytorchmergebot]

Successfully rebased copy_files_for_cutlass_backend onto refs/remotes/origin/main, please pull locally before adding more changes (for example, via git checkout copy_files_for_cutlass_backend && git pull --rebase)

[Aidyn-A]

@pytorchbot merge

[pytorchmergebot]

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