Fixes bug which affects Python3.14

[InvincibleRMC]

Description

Trying to re-run resolute CI crashes since it bumped from 3.13 -> 3.14 over that last monthish. Maybe should live in #849 but it also it is OS independent.

Related #838
#849

Is this user-facing behavior change?

Did you use Generative AI?

Additional Information

Crash log

Traceback (most recent call last):
  File "/home/jenkins-agent/workspace/ci_linux/run_ros2_batch.py", line 32, in <module>
    sys.exit(main())
             ~~~~^^
  File "/home/jenkins-agent/workspace/ci_linux/ros2_batch_job/__main__.py", line 110, in main
    return run(args, build_function, blacklisted_package_names=blacklisted_package_names)
  File "/home/jenkins-agent/workspace/ci_linux/ros2_batch_job/__main__.py", line 406, in run
    job.pre()
    ~~~~~~~^^
  File "/home/jenkins-agent/workspace/ci_linux/ros2_batch_job/linux_batch/__init__.py", line 41, in pre
    self.run(['ccache', '-s'])
    ~~~~~~~~^^^^^^^^^^^^^^^^^^
  File "/home/jenkins-agent/workspace/ci_linux/ros2_batch_job/util.py", line 195, in run
    ret = _run(cmd, exit_on_error=exit_on_error, **kwargs)
  File "/home/jenkins-agent/workspace/ci_linux/ros2_batch_job/util.py", line 220, in _run
    future = asyncio.Future()
  File "/usr/lib/python3.14/asyncio/events.py", line 715, in get_event_loop
    raise RuntimeError('There is no current event loop in thread %r.'
                       % threading.current_thread().name)

[cottsay]

Smoke test:

• Linux
• Linux-aarch64
• Linux-rhel
• Windows

[cottsay]

Ship it!