[Tests] Fix missing __qualname__ for mock callback

test_pop_alerts raised the following error:

    File "/home/runner/work/deluge/deluge/deluge/core/alertmanager.py", line 177, in handle_alerts
        handler=handler.__qualname__,
    File "lib/python3.10/unittest/mock.py", line 645, in __getattr__
        raise AttributeError(name)
    AttributeError: __qualname__

Mocks don't generate dunder methods like `__qualname__` attribute so
we need to manually specify it.

deluge/conftest.py

@@ -53,6 +53,7 @@ def mock_callback():
         mock.deferred = deferred
 
     mock = Mock()
+    mock.__qualname__ = 'mock'
     original_reset_mock = mock.reset_mock
     mock.reset_mock = reset
     mock.reset_mock()

requirements.txt

@@ -1,6 +1,5 @@
 libtorrent
-twisted[tls]>=17.1; sys_platform != 'win32'
-twisted[tls]<23,>=17.1; sys_platform == 'win32'
+twisted[tls]>=17.1
 rencode
 pyopenssl
 pyxdg

setup.py

@@ -538,8 +538,7 @@ _package_data['deluge.ui.gtk3'] = ['glade/*.ui']
 
 setup_requires = ['setuptools', 'wheel']
 install_requires = [
-    "twisted[tls]>=17.1; sys_platform != 'win32'",
-    "twisted[tls]<23,>=17.1; sys_platform == 'win32'",
+    'twisted[tls]>=17.1',
     # Add pyasn1 for setuptools workaround:
     #   https://github.com/pypa/setuptools/issues/1510
     'pyasn1',