[stubsabot] Bump setuptools to 71.0.*

Release: https://pypi.org/pypi/setuptools/71.0.3
Repository: https://github.com/pypa/setuptools
Typeshed stubs: https://github.com/python/typeshed/tree/main/stubs/setuptools
Changelog: https://setuptools.pypa.io/en/stable/history.html
Diff: pypa/setuptools@v70.3.0...v71.0.3

Stubsabot analysis of the diff between the two releases:
 - 28 public Python files have been added.
 - 1 file included in typeshed's stubs has been deleted: `pkg_resources/extern/__init__.py`.
 - 2 files included in typeshed's stubs have been modified or renamed: `pkg_resources/__init__.py`, `setuptools/__init__.py`.
 - Total lines of Python code added: 7869.
 - Total lines of Python code deleted: 15540.

If stubtest fails for this PR:
- Leave this PR open (as a reminder, and to prevent stubsabot from opening another PR)
- Fix stubtest failures in another PR, then close this PR

Note that you will need to close and re-open the PR in order to trigger CI

stubs/setuptools/METADATA.toml

@@ -1,4 +1,4 @@
-version = "70.3.*"
+version = "71.0.*"
 upstream_repository = "https://github.com/pypa/setuptools"
 
 [tool.stubtest]