distro-info: autopkgtests fail due to missing tomli dependency

[Simon Chopin]

Here's an excerpt of the failure:

FAIL: test_pylint (distro_info_test.test_pylint.PylintTestCase)
Test: Run pylint on Python source code.
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/tmp/autopkgtest.4poy97/autopkgtest_tmp/distro_info_test/test_pylint.py", line 73, in test_pylint
    self.fail("\n".join(msgs))
AssertionError: pylint exited with code 1 and has unexpected output on stderr:
Traceback (most recent call last):
  File "/usr/lib/python3.10/runpy.py", line 196, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "/usr/lib/python3.10/runpy.py", line 86, in _run_code
    exec(code, run_globals)
  File "/usr/lib/python3/dist-packages/pylint/__main__.py", line 10, in <module>
    pylint.run_pylint()
  File "/usr/lib/python3/dist-packages/pylint/__init__.py", line 32, in run_pylint
    from pylint.lint import Run as PylintRun
  File "/usr/lib/python3/dist-packages/pylint/lint/__init__.py", line 19, in <module>
    from pylint.config.exceptions import ArgumentPreprocessingError
  File "/usr/lib/python3/dist-packages/pylint/config/__init__.py", line 25, in <module>
    from pylint.config.arguments_provider import UnsupportedAction
  File "/usr/lib/python3/dist-packages/pylint/config/arguments_provider.py", line 15, in <module>
    from pylint.config.arguments_manager import _ArgumentsManager
  File "/usr/lib/python3/dist-packages/pylint/config/arguments_manager.py", line 50, in <module>
    import tomli as tomllib
ModuleNotFoundError: No module named 'tomli'

The root cause of the issue is this: https://bugs.launchpad.net/ubuntu/+source/dh-python/+bug/2002819

However, since I'm not sure how quickly we can find a satisfactory fix for that issue, I figure we could address the problem locally first by temporarily adding python3-tomli as a dependency of the distro-info test, or pylint itself (unconditionally)

[Launchpad Janitor (janitor)]

This bug was fixed in the package pylint - 2.15.9-1ubuntu1

---------------
pylint (2.15.9-1ubuntu1) lunar; urgency=medium

  * Temporarily add an unconditional dependency on python3-tomli to keep
    the package working with python3.10 (LP: #2002820)

 -- Simon Chopin <email address hidden> Fri, 13 Jan 2023 15:11:58 +0100

[Benjamin Drung (bdrung)]

This was fixed in distro-info 1.3.