Use glib's native asyncio integration when available

[marmarek]

Glib >= 3.50 has native asyncio integration. When available, use it
instead of gbulb.
This requires few minor changes:

• asyncio.run() doesn't work there (asyncio.set_event_loop() cannot be
  called on the main thread with glib...)
• there is no gbulb.wait_signal() anymore - implement it manually

Based on #191 by
@CertainLach

QubesOS/qubes-issues#9809

[qubesos-bot]

OpenQA test summary

Complete test suite and dependencies: https://openqa.qubes-os.org/tests/overview?distri=qubesos&version=4.3&build=2025052900-4.3-fedora&flavor=templates

Test run included the following:

• Use glib's native asyncio integration when available qubes-desktop-linux-menu#56 (QubesOS/qubes-desktop-linux-menu@28ef642)
• Use glib's native asyncio integration when available qubes-desktop-linux-manager#263 (QubesOS/qubes-desktop-linux-manager@dd1471d)
• Use glib's native asyncio integration when available #208 (a07df22)
• Include default background in jxl format too qubes-artwork#49 (QubesOS/qubes-artwork@3511fd7)

New failures, excluding unstable

Compared to: https://openqa.qubes-os.org/tests/overview?distri=qubesos&version=4.3&build=2025031804-4.3&flavor=update

• system_tests_whonix
  • whonix_torbrowser: unnamed test (unknown)
  • whonix_torbrowser: Failed (test died)
    # Test died: no candidate needle with tag(s) 'anon-whonix-tor-brows...

Failed tests

2 failures

• system_tests_whonix
  • whonix_torbrowser: unnamed test (unknown)
  • whonix_torbrowser: Failed (test died)
    # Test died: no candidate needle with tag(s) 'anon-whonix-tor-brows...

Fixed failures

Compared to: https://openqa.qubes-os.org/tests/132953#dependencies

5 fixed

• system_tests_basic_vm_qrexec_gui

  • TC_20_NonAudio_whonix-gateway-17: test_300_bug_1028_gui_memory_pinning (failure)
    AssertionError: Dom0 window doesn't match VM window content, saved ...

• system_tests_whonix

  • whonixcheck: fail (unknown)
    Whonixcheck for sys-whonix failed...

  • whonixcheck: unnamed test (unknown)

• system_tests_audio

  • TC_20_AudioVM_Pulse_whonix-workstation-17: test_252_audio_playback_audiovm_switch_hvm (failure)
    AssertionError: only silence detected, no useful audio data

• system_tests_qrexec

  • TC_00_Qrexec_fedora-41-xfce: test_081_qrexec_service_argument_allow_specific (error)
    subprocess.CalledProcessError: Command '/usr/lib/qubes/qrexec-clien...

Unstable tests

• system_tests_update

  update2/Failed (1/5 times with errors)

  • job 139051 # Test died: command 'script -c 'qubes-vm-update --force-update --l...

Performance Tests

Performance degradation:

No issues

Remaining performance tests:

No remaining performance tests

[codecov]

Codecov Report

❌ Patch coverage is 13.33333% with 13 lines in your changes missing coverage. Please review.
✅ Project coverage is 78.90%. Comparing base (fc01331) to head (845750a).
⚠️ Report is 10 commits behind head on main.

Files with missing lines	Patch %	Lines
qrexec/tools/qrexec_policy_agent.py	13.33%	13 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #208      +/-   ##
==========================================
- Coverage   79.01%   78.90%   -0.12%     
==========================================
  Files          55       55              
  Lines       10508    10519      +11     
==========================================
- Hits         8303     8300       -3     
- Misses       2205     2219      +14     

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