url: .urlban privilege check is broken

[dgw]

Description

Non-admin users hit a broken channel-privilege check if they try to use .urlban, which throws an uncaught exception.

Reproduction steps

0. Be a non-admin user, i.e. not listed in Sopel's core.admins or core.owner settings
1. Do .urlban *
2. Sopel spits out an unexpected AttributeError

Expected behavior

Use of the .urlban command by non-admins should be correctly allowed or denied based on their channel privilege level and the bot's url.exclude_required_access setting.

Relevant logs

[2025-01-24 02:51:44,490] sopel.bot            ERROR    - Unexpected AttributeError (module 'sopel.privileges' has no attribute 'OP') from msv. Message was: .urlban *
Traceback (most recent call last):
  File "/home/sopel/.local/lib/python3.12/site-packages/sopel/bot.py", line 698, in call_rule
    rule.execute(sopel, trigger)
  File "/home/sopel/.local/lib/python3.12/site-packages/sopel/plugins/rules.py", line 1273, in execute
    exit_code = self._handler(bot, trigger)
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/sopel/.local/lib/python3.12/site-packages/sopel/builtins/url.py", line 183, in url_ban
    if not _user_can_change_excludes(bot, trigger):
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/sopel/.local/lib/python3.12/site-packages/sopel/builtins/url.py", line 162, in _user_can_change_excludes
    if user_access >= getattr(privileges, required_access):
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: module 'sopel.privileges' has no attribute 'OP'

Notes

Someone reported this bug on our IRC last night. @SnoopJ correctly deduced that it was related to the switch to privileges.AccessLevel. We can safely say #2540 was responsible for this breakage; as is often the case, it was my fault. I forgot about #2352 when making that change.

sopel.privileges.names is a new shortcut to sopel.privileges.AccessLevel._member_names_, which is quite a mouthful. (I wanted to create sopel.privileges.AccessLevel.names as a @property, but that doesn't work and I don't want to monkeypatch our subclass of enum.IntFlag too much.)

Sopel version

8.0.1, master

Installation method

pip install

Python version

3.12.7

Operating system

No response

IRCd

No response

Relevant plugins

url

[dgw]

Note: I started working on this in the privilege-names branch.

The solution there is adding a sopel.privileges.names attribute as a shortcut to sopel.privileges.AccessLevel._member_names_, though using the AccessLevel attr directly would obviously work without the shortcut.

I'm holding off on opening a PR because of unresolved CI issues, though. See #2647.

[dgw]

Fixed by #2650, just not correctly linked/closed automatically.