Issue #28046: Fix distutils

Why do we have two sysconfig modules again?

Lib/distutils/sysconfig.py

@@ -418,7 +418,11 @@ _config_vars = None
 def _init_posix():
     """Initialize the module as appropriate for POSIX systems."""
     # _sysconfigdata is generated at build time, see the sysconfig module
-    name = '_sysconfigdata_' + sys.abiflags
+    name = '_sysconfigdata_{abi}_{platform}_{multiarch}'.format(
+        abi=sys.abiflags,
+        platform=sys.platform,
+        multiarch=getattr(sys.implementation, '_multiarch', ''),
+    )
     _temp = __import__(name, globals(), locals(), ['build_time_vars'], 0)
     build_time_vars = _temp.build_time_vars
     global _config_vars