skip event_loop_on test with pyside6 on mac

[cjdoris]

We've started getting the following error during tests on Mac. For now we're just skipping this particular test as broken.

PySide6/__init__.py: Unable to import Shiboken from /Users/runner/work/PythonCall.jl/PythonCall.jl/pysrc, /Users/runner/work/PythonCall.jl/PythonCall.jl/test/.CondaPkg/.pixi/envs/default/lib/python314t.zip, /Users/runner/work/PythonCall.jl/PythonCall.jl/test/.CondaPkg/.pixi/envs/default/lib/python3.14t, /Users/runner/work/PythonCall.jl/PythonCall.jl/test/.CondaPkg/.pixi/envs/default/lib/python3.14t/lib-dynload, /Users/runner/work/PythonCall.jl/PythonCall.jl/test/.CondaPkg/.pixi/envs/default/lib/python3.14t/site-packages, /Users/runner/work/PythonCall.jl/PythonCall.jl/test/.CondaPkg/.pixi/envs/default/lib/python3.14/site-packages: No module named 'shiboken6.Shiboken'
  pyside6: Error During Test at /Users/runner/work/PythonCall.jl/PythonCall.jl/test/Compat.jl:13
    Test threw exception
    Expression: PythonCall.event_loop_on(g) isa Timer
    Python: ModuleNotFoundError: No module named 'shiboken6.Shiboken'
    Python stacktrace:
     [1] <module>
       @ ~/work/PythonCall.jl/PythonCall.jl/test/.CondaPkg/.pixi/envs/default/lib/python3.14/site-packages/shiboken6/__init__.py:27
     [2] _setupQtDirectories
       @ ~/work/PythonCall.jl/PythonCall.jl/test/.CondaPkg/.pixi/envs/default/lib/python3.14/site-packages/PySide6/__init__.py:66
     [3] <module>
       @ ~/work/PythonCall.jl/PythonCall.jl/test/.CondaPkg/.pixi/envs/default/lib/python3.14/site-packages/PySide6/__init__.py:143
     [4] new_event_loop_callback
       @ <string>:12
    Stacktrace:
      [1] pythrow()
        @ PythonCall.Core ~/work/PythonCall.jl/PythonCall.jl/src/Core/err.jl:77
      [2] errcheck
        @ ~/work/PythonCall.jl/PythonCall.jl/src/Core/err.jl:10 [inlined]
      [3] pycallargs
        @ ~/work/PythonCall.jl/PythonCall.jl/src/Core/builtins.jl:194 [inlined]
      [4] #pycall#25
        @ ~/work/PythonCall.jl/PythonCall.jl/src/Core/builtins.jl:213 [inlined]
      [5] pycall
        @ ~/work/PythonCall.jl/PythonCall.jl/src/Core/builtins.jl:203 [inlined]
      [6] Py
        @ ~/work/PythonCall.jl/PythonCall.jl/src/Core/Py.jl:357 [inlined]
      [7] event_loop_on(g::Symbol; interval::Float64, fix::Bool)
        @ PythonCall.Compat ~/work/PythonCall.jl/PythonCall.jl/src/Compat/gui.jl:195
      [8] event_loop_on
        @ ~/work/PythonCall.jl/PythonCall.jl/src/Compat/gui.jl:192 [inlined]
      [9] macro expansion
        @ ~/hostedtoolcache/julia/1.12.6/aarch64/share/julia/stdlib/v1.12/Test/src/Test.jl:677 [inlined]
     [10] macro expansion
        @ ~/work/PythonCall.jl/PythonCall.jl/test/Compat.jl:13 [inlined]
     [11] macro expansion
        @ ~/hostedtoolcache/julia/1.12.6/aarch64/share/julia/stdlib/v1.12/Test/src/Test.jl:1866 [inlined]
     [12] macro expansion
        @ ~/work/PythonCall.jl/PythonCall.jl/test/Compat.jl:8 [inlined]
     [13] macro expansion
        @ ~/hostedtoolcache/julia/1.12.6/aarch64/share/julia/stdlib/v1.12/Test/src/Test.jl:1777 [inlined]
     [14] top-level scope
        @ ~/work/PythonCall.jl/PythonCall.jl/test/Compat.jl:8

e.g. https://github.com/JuliaPy/PythonCall.jl/actions/runs/31814802346/job/94813795114

[github-actions]

Benchmark Results (Julia v1)

Time benchmarks

	main	013eea8...	main / 013eea8...
basic/@py/pydict/init	0.249 ± 0.052 ms	0.248 ± 0.05 ms	1 ± 0.29
basic/@py/pydict/pydel	0.254 ± 0.028 ms	0.254 ± 0.023 ms	1 ± 0.14
basic/julia/pydict/init	0.22 ± 0.074 ms	0.223 ± 0.077 ms	0.984 ± 0.47
basic/julia/pydict/pydel	0.228 ± 0.044 ms	0.231 ± 0.045 ms	0.989 ± 0.27
gc/full	0.614 ± 0.01 s	0.654 ± 0.012 s	0.939 ± 0.023
time_to_load	2.3 ± 0.049 s	2.33 ± 0.058 s	0.986 ± 0.032

Memory benchmarks

	main	013eea8...	main / 013eea8...
basic/@py/pydict/init	5.01 k allocs: 0.0764 MB	5.01 k allocs: 0.0764 MB	1
basic/@py/pydict/pydel	5.01 k allocs: 0.0764 MB	5.01 k allocs: 0.0764 MB	1
basic/julia/pydict/init	4.01 k allocs: 0.0612 MB	4.01 k allocs: 0.0612 MB	1
basic/julia/pydict/pydel	4.01 k allocs: 0.0612 MB	4.01 k allocs: 0.0612 MB	1
gc/full	0 allocs: 0 B	0 allocs: 0 B
time_to_load	0.143 k allocs: 10.6 kB	0.143 k allocs: 10.6 kB	1