fix pip3 install error for example like cutlass-gemm in local build.

[sywangyi]

following the https://github.com/huggingface/kernel-builder/blob/main/docs/local-dev.md
error like

      copying /tmp/tmpbzk7cg7n.build-lib/cutlass-gemm/_cutlass_gemm_0063d52.abi3.so -> torch-ext/cutlass-gemm
      Traceback (most recent call last):
        File "/opt/venv/lib/python3.12/site-packages/setuptools/_distutils/file_util.py", line 39, in _copy_file_contents
          fdst = open(dst, 'wb')
                 ^^^^^^^^^^^^^^^
      FileNotFoundError: [Errno 2] No such file or directory: 'torch-ext/cutlass-gemm/_cutlass_gemm_0063d52.abi3.so'

      During handling of the above exception, another exception occurred:

      Traceback (most recent call last):
        File "/opt/venv/lib/python3.12/site-packages/setuptools/command/editable_wheel.py", line 139, in run
          self._create_wheel_file(bdist_wheel)
        File "/opt/venv/lib/python3.12/site-packages/setuptools/command/editable_wheel.py", line 340, in _create_wheel_file
          files, mapping = self._run_build_commands(dist_name, unpacked, lib, tmp)
                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/opt/venv/lib/python3.12/site-packages/setuptools/command/editable_wheel.py", line 263, in _run_build_commands
          self._run_build_subcommands()
        File "/opt/venv/lib/python3.12/site-packages/setuptools/command/editable_wheel.py", line 290, in _run_build_subcommands
          self.run_command(name)
        File "/opt/venv/lib/python3.12/site-packages/setuptools/_distutils/cmd.py", line 357, in run_command
          self.distribution.run_command(command)
        File "/opt/venv/lib/python3.12/site-packages/setuptools/dist.py", line 1104, in run_command
          super().run_command(command)
        File "/opt/venv/lib/python3.12/site-packages/setuptools/_distutils/dist.py", line 1021, in run_command
          cmd_obj.run()
        File "/opt/venv/lib/python3.12/site-packages/setuptools/command/build_ext.py", line 102, in run
          self.copy_extensions_to_source()
        File "/opt/venv/lib/python3.12/site-packages/setuptools/command/build_ext.py", line 123, in copy_extensions_to_source
          self.copy_file(regular_file, inplace_file, level=self.verbose)
        File "/opt/venv/lib/python3.12/site-packages/setuptools/_distutils/cmd.py", line 421, in copy_file
          return file_util.copy_file(
                 ^^^^^^^^^^^^^^^^^^^^
        File "/opt/venv/lib/python3.12/site-packages/setuptools/_distutils/file_util.py", line 157, in copy_file
          _copy_file_contents(src, dst)
        File "/opt/venv/lib/python3.12/site-packages/setuptools/_distutils/file_util.py", line 41, in _copy_file_contents
          raise DistutilsFileError(f"could not create '{dst}': {e.strerror}")
      distutils.errors.DistutilsFileError: could not create 'torch-ext/cutlass-gemm/_cutlass_gemm_0063d52.abi3.so': No such file or directory
      /opt/venv/lib/python3.12/site-packages/setuptools/_distutils/dist.py:1021: _DebuggingTips: Problem in editable installation.

[sywangyi]

@danieldk please help review

[MekkCyber]

Makes sense. Thank you. The CI is green here : #314