[Maint] Fix comprehensive tests by skipping labels controls test on p…

…y311 pyqt6 (#5922)

# Fixes/Closes

Closes # #5921

# Description

In #5439 @Carreau identified a failing condition for the
qt_layer_controls test that a results in a fault on python 3.11 and
pyqt5 on ubuntu. However, in that PR, pyqt6 was not tested with python
311. The same test can be see to fail in comprehensive tests which do
run python 311 and pyqt6.
This PR adds pyqt6 to the check to skip the test.

# References

#5439 

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Grzegorz Bokota <bokota+github@gmail.com>

napari/_qt/layer_controls/_tests/test_qt_layer_controls.py

@@ -178,11 +178,14 @@ def test_create_layer_controls(
             qcombobox.setCurrentIndex(qcombobox_initial_idx)
 
 
-if sys.version_info[:2] == (3, 11) and qtpy.API == 'pyqt5':
+if sys.version_info[:2] == (3, 11) and (
+    qtpy.API == 'pyqt5' or qtpy.API == 'pyqt6'
+):
     test_data = []
 else:
-    # those 2 fail on 3.11 + pyqt5 with a segfault that can't be caught by
+    # those 2 fail on 3.11 + pyqt5 and pyqt6 with a segfault that can't be caught by
     # pytest in qspinbox.setValue(value)
+    # See: https://github.com/napari/napari/pull/5439
     test_data = [_LABELS_WITH_COLOR, _LABELS]