REGRESSION(c3a572d): TypeError: can't compare offset-naive and offset-aware datetimes

[gsnedders]

It seems like @jgraham's attempt to fix everything for Python 3.12 broke this:

Traceback (most recent call last):
  File "/Volumes/gsnedders/projects/Safari/OS2/LayoutTests/imported/w3c/web-platform-tests/wpt.py", line 7, in <module>
    exec(compile(open("wpt", "r").read(), "wpt", 'exec'))
  File "wpt", line 10, in <module>
    wpt.main()
  File "/Volumes/gsnedders/projects/Safari/OS2/LayoutTests/imported/w3c/web-platform-tests/tools/wpt/wpt.py", line 233, in main
    rv = script(*args, **kwargs)
  File "/Volumes/gsnedders/projects/Safari/OS2/LayoutTests/imported/w3c/web-platform-tests/tools/serve/serve.py", line 1208, in run
    with build_config(logger,
  File "/Volumes/gsnedders/projects/Safari/OS2/LayoutTests/imported/w3c/web-platform-tests/tools/wptserve/wptserve/config.py", line 256, in __enter__
    data[key] = getattr(self, prefix + key)(data)
  File "/Volumes/gsnedders/projects/Safari/OS2/LayoutTests/imported/w3c/web-platform-tests/tools/wptserve/wptserve/config.py", line 334, in _get_ssl_config
    key_path, cert_path = self._ssl_env.host_cert_path(data["domains_set"])
  File "/Volumes/gsnedders/projects/Safari/OS2/LayoutTests/imported/w3c/web-platform-tests/tools/wptserve/wptserve/sslutils/openssl.py", line 367, in host_cert_path
    key_cert = self._load_host_cert(hosts)
  File "/Volumes/gsnedders/projects/Safari/OS2/LayoutTests/imported/w3c/web-platform-tests/tools/wptserve/wptserve/sslutils/openssl.py", line 384, in _load_host_cert
    if self.check_key_cert(key_path, cert_path, hosts):
  File "/Volumes/gsnedders/projects/Safari/OS2/LayoutTests/imported/w3c/web-platform-tests/tools/wptserve/wptserve/sslutils/openssl.py", line 319, in check_key_cert
    if end_date < datetime.now(timezone.utc) + time_buffer:
TypeError: can't compare offset-naive and offset-aware datetimes