Adding aggregator tests again (backport #467)

[mergify]

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This is an automatic backport of pull request #467 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of fa226a4 has failed:

On branch mergify/bp/ros2-humble/pr-467
Your branch is up to date with 'origin/ros2-humble'.

You are currently cherry-picking commit fa226a4.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	renamed:    diagnostic_aggregator/test/add_analyzers.launch.py.in -> diagnostic_aggregator/test/test_add_analyzers.launch.py.in
	modified:   diagnostic_aggregator/test/test_analyzers_output.launch.py.in
	renamed:    diagnostic_aggregator/test/create_analyzers.launch.py.in -> diagnostic_aggregator/test/test_create_analyzers.launch.py.in
	modified:   diagnostic_common_diagnostics/test/systemtest/test_hd_monitor_launchtest.py
	modified:   diagnostic_remote_logging/CMakeLists.txt

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   diagnostic_aggregator/CMakeLists.txt
	both modified:   diagnostic_common_diagnostics/CMakeLists.txt

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally