remove python 3.9 support (#10406)

Fixes https://github.com/certbot/certbot/issues/10389. you can compare
this to the PR that did this for python 3.8 at
https://github.com/certbot/certbot/pull/10077

additional changes:
- linux-py310 test is removed from extended tests, since it's now run in
standard tests. additionally, openssl will never be < 1.1.1 now, due to
https://peps.python.org/pep-0644/.
- `letstest/scripts/test_openssl_version.py` was testing functionality
that was removed in https://github.com/certbot/certbot/pull/10373 so it
was deleted

---------

Co-authored-by: Brad Warren <bmw@users.noreply.github.com>

certbot-apache/setup.py

@@ -28,7 +28,7 @@ setup(
     author="Certbot Project",
     author_email='certbot-dev@eff.org',
     license='Apache License 2.0',
-    python_requires='>=3.9.2',
+    python_requires='>=3.10',
     classifiers=[
         'Development Status :: 5 - Production/Stable',
         'Environment :: Plugins',
@@ -37,7 +37,6 @@ setup(
         'Operating System :: POSIX :: Linux',
         'Programming Language :: Python',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.9',
         'Programming Language :: Python :: 3.10',
         'Programming Language :: Python :: 3.11',
         'Programming Language :: Python :: 3.12',