[python] install failure with `pip`

[msyyc]

Some codegen users report install error with pip:

npm warn cleanup Failed to remove some directories [
npm warn cleanup   [
npm warn cleanup     '\\\\?\\C:\\Users\\v-amberchen\\source\\repos\\azure-sdk-for-python\\sdk\\cognitivelanguage\\azure-ai-language-conversations-authoring\\TempTypeSpecFiles\\node_modules\\@typespec\\compiler',
npm warn cleanup     [Error: EPERM: operation not permitted, rmdir 'C:\Users\v-amberchen\source\repos\azure-sdk-for-python\sdk\cognitivelanguage\azure-ai-language-conversations-authoring\TempTypeSpecFiles\node_modules\@typespec\compiler\dist\src\core'] {
npm warn cleanup       errno: -4048,
npm warn cleanup       code: 'EPERM',
npm warn cleanup       syscall: 'rmdir',
npm warn cleanup       path: 'C:\\Users\\v-amberchen\\source\\repos\\azure-sdk-for-python\\sdk\\cognitivelanguage\\azure-ai-language-conversations-authoring\\TempTypeSpecFiles\\node_modules\\@typespec\\compiler\\dist\\src\\core'      
npm warn cleanup     }
npm warn cleanup   ],
npm warn cleanup   [
npm warn cleanup     '\\\\?\\C:\\Users\\v-amberchen\\source\\repos\\azure-sdk-for-python\\sdk\\cognitivelanguage\\azure-ai-language-conversations-authoring\\TempTypeSpecFiles\\node_modules\\@typespec',
npm warn cleanup     [Error: EPERM: operation not permitted, rmdir 'C:\Users\v-amberchen\source\repos\azure-sdk-for-python\sdk\cognitivelanguage\azure-ai-language-conversations-authoring\TempTypeSpecFiles\node_modules\@typespec\http-client-python\generator\build\lib\pygen\codegen'] {
npm warn cleanup       errno: -4048,
npm warn cleanup       code: 'EPERM',
npm warn cleanup       syscall: 'rmdir',
npm warn cleanup       path: 'C:\\Users\\v-amberchen\\source\\repos\\azure-sdk-for-python\\sdk\\cognitivelanguage\\azure-ai-language-conversations-authoring\\TempTypeSpecFiles\\node_modules\\@typespec\\http-client-python\\generator\\build\\lib\\pygen\\codegen'
npm warn cleanup     }
npm warn cleanup   ],
npm warn cleanup   [
npm warn cleanup     '\\\\?\\C:\\Users\\v-amberchen\\source\\repos\\azure-sdk-for-python\\sdk\\cognitivelanguage\\azure-ai-language-conversations-authoring\\TempTypeSpecFiles\\node_modules\\@typespec\\http-client-python',
npm warn cleanup     [Error: EPERM: operation not permitted, rmdir 'C:\Users\v-amberchen\source\repos\azure-sdk-for-python\sdk\cognitivelanguage\azure-ai-language-conversations-authoring\TempTypeSpecFiles\node_modules\@typespec\http-client-python\venv\Lib\site-packages\pip\_vendor'] {
npm warn cleanup       errno: -4048,
npm warn cleanup       code: 'EPERM',
npm warn cleanup       syscall: 'rmdir',
npm warn cleanup       path: 'C:\\Users\\v-amberchen\\source\\repos\\azure-sdk-for-python\\sdk\\cognitivelanguage\\azure-ai-language-conversations-authoring\\TempTypeSpecFiles\\node_modules\\@typespec\\http-client-python\\venv\\Lib\\site-packages\\pip\\_vendor'
npm warn cleanup     }
npm warn cleanup   ],
npm warn cleanup   [
npm warn cleanup     '\\\\?\\C:\\Users\\v-amberchen\\source\\repos\\azure-sdk-for-python\\sdk\\cognitivelanguage\\azure-ai-language-conversations-authoring\\TempTypeSpecFiles\\node_modules\\@azure-tools',
npm warn cleanup     [Error: EPERM: operation not permitted, rmdir 'C:\Users\v-amberchen\source\repos\azure-sdk-for-python\sdk\cognitivelanguage\azure-ai-language-conversations-authoring\TempTypeSpecFiles\node_modules\@azure-tools\typespec-python\venv'] {
npm warn cleanup       errno: -4048,
npm warn cleanup       code: 'EPERM',
npm warn cleanup       syscall: 'rmdir',
npm warn cleanup       path: 'C:\\Users\\v-amberchen\\source\\repos\\azure-sdk-for-python\\sdk\\cognitivelanguage\\azure-ai-language-conversations-authoring\\TempTypeSpecFiles\\node_modules\\@azure-tools\\typespec-python\\venv'       
npm warn cleanup     }
npm warn cleanup   ]
npm warn cleanup ]
npm error code 1
npm error path C:\Users\v-amberchen\source\repos\azure-sdk-for-python\sdk\cognitivelanguage\azure-ai-language-conversations-authoring\TempTypeSpecFiles\node_modules\@azure-tools\typespec-python
npm error command failed
npm error command C:\WINDOWS\system32\cmd.exe /d /s /c tsx ./scripts/run-python3.ts ./scripts/install.py
npm error Traceback (most recent call last):
npm error   File "C:\Users\v-amberchen\source\repos\azure-sdk-for-python\sdk\cognitivelanguage\azure-ai-language-conversations-authoring\TempTypeSpecFiles\node_modules\@azure-tools\typespec-python\scripts\install.py", line 46, in <module>
npm error     main()
npm error     ~~~~^^
npm error   File "C:\Users\v-amberchen\source\repos\azure-sdk-for-python\sdk\cognitivelanguage\azure-ai-language-conversations-authoring\TempTypeSpecFiles\node_modules\@azure-tools\typespec-python\scripts\install.py", line 39, in main
npm error     venv_context = create_venv_with_package_manager(venv_path)
npm error   File "C:\Users\v-amberchen\source\repos\azure-sdk-for-python\sdk\cognitivelanguage\azure-ai-language-conversations-authoring\TempTypeSpecFiles\node_modules\@azure-tools\typespec-python\scripts\package_manager.py", line 140, in create_venv_with_package_manager
npm error     env_builder.create(venv_path)
npm error     ~~~~~~~~~~~~~~~~~~^^^^^^^^^^^
npm error   File "C:\Users\v-amberchen\AppData\Local\Programs\Python\Python313\Lib\venv\__init__.py", line 82, in create
npm error     self._setup_pip(context)
npm error     ~~~~~~~~~~~~~~~^^^^^^^^^
npm error   File "C:\Users\v-amberchen\AppData\Local\Programs\Python\Python313\Lib\venv\__init__.py", line 446, in _setup_pip
npm error     self._call_new_python(context, '-m', 'ensurepip', '--upgrade',
npm error     ~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
npm error                           '--default-pip', stderr=subprocess.STDOUT)
npm error                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
npm error   File "C:\Users\v-amberchen\AppData\Local\Programs\Python\Python313\Lib\venv\__init__.py", line 442, in _call_new_python
npm error     subprocess.check_output(args, **kwargs)
npm error     ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^
npm error   File "C:\Users\v-amberchen\AppData\Local\Programs\Python\Python313\Lib\subprocess.py", line 472, in check_output
npm error     return run(*popenargs, stdout=PIPE, timeout=timeout, check=True,
npm error            ~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
npm error                **kwargs).stdout
npm error                ^^^^^^^^^
npm error   File "C:\Users\v-amberchen\AppData\Local\Programs\Python\Python313\Lib\subprocess.py", line 577, in run  
npm error     raise CalledProcessError(retcode, process.args,
npm error                              output=stdout, stderr=stderr)
npm error subprocess.CalledProcessError: Command '['C:\\Users\\v-amberchen\\source\\repos\\azure-sdk-for-python\\sdk\\cognitivelanguage\\azure-ai-language-conversations-authoring\\TempTypeSpecFiles\\node_modules\\@azure-tools\\typespec-python\\venv\\Scripts\\python.exe', '-m', 'ensurepip', '--upgrade', '--default-pip']' returned non-zero exit status 1.
npm error Error: Command failed: py -3 ./scripts/install.py
npm error A complete log of this run can be found in: C:\Users\v-amberchen\AppData\Local\npm-cache\_logs\2025-07-21T22_34_40_381Z-debug-0.log
update

[msyyc]

I can't reproduce it locally for now.