gh-107211: No longer export internal functions (1) (#107213)

No longer export these 49 internal C API functions:

* _PyArgv_AsWstrList()
* _PyCode_New()
* _PyCode_Validate()
* _PyFloat_DebugMallocStats()
* _PyFloat_FormatAdvancedWriter()
* _PyImport_CheckSubinterpIncompatibleExtensionAllowed()
* _PyImport_ClearExtension()
* _PyImport_GetModuleId()
* _PyImport_SetModuleString()
* _PyInterpreterState_IDDecref()
* _PyInterpreterState_IDIncref()
* _PyInterpreterState_IDInitref()
* _PyInterpreterState_LookUpID()
* _PyWideStringList_AsList()
* _PyWideStringList_CheckConsistency()
* _PyWideStringList_Clear()
* _PyWideStringList_Copy()
* _PyWideStringList_Extend()
* _Py_ClearArgcArgv()
* _Py_DecodeUTF8Ex()
* _Py_DecodeUTF8_surrogateescape()
* _Py_EncodeLocaleRaw()
* _Py_EncodeUTF8Ex()
* _Py_GetEnv()
* _Py_GetForceASCII()
* _Py_GetLocaleEncoding()
* _Py_GetLocaleEncodingObject()
* _Py_GetLocaleconvNumeric()
* _Py_ResetForceASCII()
* _Py_device_encoding()
* _Py_dg_dtoa()
* _Py_dg_freedtoa()
* _Py_dg_strtod()
* _Py_get_blocking()
* _Py_get_env_flag()
* _Py_get_inheritable()
* _Py_get_osfhandle_noraise()
* _Py_get_xoption()
* _Py_open()
* _Py_open_osfhandle()
* _Py_open_osfhandle_noraise()
* _Py_read()
* _Py_set_blocking()
* _Py_str_to_int()
* _Py_wfopen()
* _Py_wgetcwd()
* _Py_wreadlink()
* _Py_wrealpath()
* _Py_write()