Avoid importing distutils globally

The distutils module is deprecated in 3.11 so we should avoid importing
it unless absolutely necessary to avoid emitting superfulous warnings.

Author: uranusjr

src/pip/_internal/locations/__init__.py

@@ -11,7 +11,7 @@
 from pip._internal.utils.deprecation import deprecated
 from pip._internal.utils.virtualenv import running_under_virtualenv
 
-from . import _distutils, _sysconfig
+from . import _sysconfig
 from .base import (
     USER_CACHE_DIR,
     get_major_minor_version,
@@ -241,6 +241,8 @@ def get_scheme(
     if _USE_SYSCONFIG:
         return new
 
+    from . import _distutils
+
     old = _distutils.get_scheme(
         dist_name,
         user=user,
@@ -405,6 +407,8 @@ def get_bin_prefix() -> str:
     if _USE_SYSCONFIG:
         return new
 
+    from . import _distutils
+
     old = _distutils.get_bin_prefix()
     if _warn_if_mismatch(pathlib.Path(old), pathlib.Path(new), key="bin_prefix"):
         _log_context()
@@ -438,6 +442,8 @@ def get_purelib() -> str:
     if _USE_SYSCONFIG:
         return new
 
+    from . import _distutils
+
     old = _distutils.get_purelib()
     if _looks_like_deb_system_dist_packages(old):
         return old
@@ -452,6 +458,8 @@ def get_platlib() -> str:
     if _USE_SYSCONFIG:
         return new
 
+    from . import _distutils
+
     old = _distutils.get_platlib()
     if _looks_like_deb_system_dist_packages(old):
         return old
@@ -480,6 +488,8 @@ def get_prefixed_libs(prefix: str) -> List[str]:
     if _USE_SYSCONFIG:
         return _deduplicated(new_pure, new_plat)
 
+    from . import _distutils
+
     old_pure, old_plat = _distutils.get_prefixed_libs(prefix)
     old_lib_paths = _deduplicated(old_pure, old_plat)