Revert "bpo-46986: Upgrade bundled setuptools to 60.9.3 (GH-31820)" (GH-31879)

This reverts commit c99ac3c
as it breaks test_bdb and test_distutils with installed Pythons.

Author: ned-deily

Lib/ensurepip/__init__.py

@@ -10,7 +10,7 @@
 
 __all__ = ["version", "bootstrap"]
 _PACKAGE_NAMES = ('setuptools', 'pip')
-_SETUPTOOLS_VERSION = "60.9.3"
+_SETUPTOOLS_VERSION = "58.1.0"
 _PIP_VERSION = "22.0.4"
 _PROJECTS = [
     ("setuptools", _SETUPTOOLS_VERSION, "py3"),