[Split Build][WIP] option to build torch using seperate wheel

[PaliC]

Stack from ghstack (oldest at bottom):

• -> [Split Build][WIP] option to build torch using seperate wheel #125965
• [Split Build] option to build c10 using seperate wheel #125964
• [Split Build] add option to create a libtorch wheel #125715

[pytorch-bot]

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❌ 21 New Failures

As of commit 0c38b17 with merge base faf0015 ():

NEW FAILURES - The following jobs have failed:

• Check mergeability of ghstack PR / ghstack-mergeability-check (gh)
  RuntimeError: Command git -C /home/runner/work/pytorch/pytorch cherry-pick -x 99d984d returned non-zero exit code 1
• Lint / lintrunner-clang / linux-job (gh)
  RuntimeError: Command docker exec -t f8a2850f7701cf9c68a1893c0c83e171033336509fff970aa8a27aad8ec310ba /exec failed with exit code 1
• Lint / Test collect_env (older_python_version) (gh)
  The process '/usr/bin/bash' failed with exit code 1
• Lint / Test collect_env (with_torch) (gh)
  ##[error]The operation was canceled.
• pull / linux-focal-cuda11.8-py3.10-gcc9 / build (gh)
  Process completed with exit code 1.
• pull / linux-focal-cuda12.1-py3.10-gcc9 / build (gh)
  Process completed with exit code 1.
• pull / linux-focal-cuda12.1-py3.10-gcc9-sm86 / build (gh)
  Process completed with exit code 1.
• pull / linux-focal-py3_8-clang9-xla / build (gh)
  Process completed with exit code 1.
• pull / linux-focal-py3.11-clang10 / build (gh)
  Process completed with exit code 1.
• pull / linux-focal-py3.12-clang10 / build (gh)
  Process completed with exit code 1.
• pull / linux-focal-py3.8-clang10 / build (gh)
  Process completed with exit code 1.
• pull / linux-focal-py3.8-clang10-onnx / build (gh)
  Process completed with exit code 1.
• pull / linux-focal-rocm6.1-py3.8 / build (gh)
  Process completed with exit code 1.
• pull / linux-jammy-cuda11.8-cudnn8-py3.8-clang12 / build (gh)
  Process completed with exit code 1.
• pull / linux-jammy-py3-clang12-executorch / build (gh)
  Process completed with exit code 1.
• pull / linux-jammy-py3.10-clang15-asan / build (gh)
  Process completed with exit code 1.
• pull / linux-jammy-py3.8-gcc11 / build (gh)
  Process completed with exit code 1.
• pull / linux-jammy-py3.8-gcc11-mobile-lightweight-dispatch-build / build (gh)
  undefined reference to c10::UndefinedTensorImpl::_singleton'`
• pull / linux-jammy-py3.8-gcc11-no-ops / build (gh)
  Process completed with exit code 1.
• pull / linux-jammy-py3.8-gcc11-pch / build (gh)
  Process completed with exit code 1.
• pull / win-vs2019-cpu-py3 / build (gh)
  C:\actions-runner\_work\pytorch\pytorch\test\cpp\c10d\ProcessGroupGlooTest.cpp(17): fatal error C1083: Cannot open include file: 'torch/cuda.h': No such file or directory

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