avocado-runner-* crashes when status server socket closes

[clebergnu]

Describe the bug
All runners built on top of avocado.core.nrunner.app.BaseRunnerApp will use TaskStatusService.post() to send status messages to the status server. If the socket get closed, there will be an EPIPE returned during send(), followed by a SIGPIPE, followed by a BrokenPipeError that is not handled, which results in a crash.

Steps to reproduce

1. nc -l -U /tmp/socket &
2. avocado-runner-rogue task-run -i ID -u x-avocado-runner-rogue -s /tmp/socket &
3. kill %1

Expected behavior
The runners should be more resilient when the status server is not operating properly. Ignoring failures is not a good option, so maybe runners will need a way to queue and persist messages they can't initially send to status servers.

But known crashes should be prevented, and unknown crashes (with information such as backtraces) should be captured.

Current behavior

avocado-runner-rogue task-run -i ID -u x-avocado-runner-rogue -s /tmp/socket &
[1] 747815
{'status': 'started', 'time': 142105.739663621, 'output_dir': '/tmp/.avocado-task-djf9hljx', 'id': 'ID'}
{'status': 'running', 'time': 142105.739762377, 'id': 'ID'}
...
{'status': 'running', 'time': 142113.250716832, 'id': 'ID'}
Traceback (most recent call last):
  File "/home/cleber/.local/bin/avocado-runner-rogue", line 33, in <module>
    sys.exit(load_entry_point('avocado-rogue', 'console_scripts', 'avocado-runner-rogue')())
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/cleber/src/avocado/avocado/examples/plugins/tests/rogue/avocado_rogue/runner.py", line 55, in main
    app.run()
  File "/home/cleber/src/avocado/avocado/avocado/core/nrunner/app.py", line 179, in run
    return kallable(args)
           ^^^^^^^^^^^^^^
  File "/home/cleber/src/avocado/avocado/avocado/core/nrunner/app.py", line 293, in command_task_run
    for status in task.run():
  File "/home/cleber/src/avocado/avocado/avocado/core/nrunner/task.py", line 213, in run
    status_service.post(status)
  File "/home/cleber/src/avocado/avocado/avocado/core/nrunner/task.py", line 65, in post
    self.connection.send(data.encode("ascii") + "\n".encode("ascii"))
BrokenPipeError: [Errno 32] Broken pipe

System information (please complete the following information):

• OS: LSB Version: :core-4.1-amd64:core-4.1-noarch:cxx-4.1-amd64:cxx-4.1-noarch:desktop-4.1-amd64:desktop-4.1-noarch:languages-4.1-amd64:languages-4.1-noarch:printing-4.1-amd64:printing-4.1-noarch Distributor ID: Fedora Description: Fedora release 38 (Thirty Eight) Release: 38 Codename: ThirtyEight
• Avocado version: a038820
• Avocado installation method: Git

Additional information
This was found under #5788

[richtja]

Solved in #5860