AP_DDS - no tests

[Ryanf55]

Bug report

Issue details

Something appears to have broken in the colcon tests. None of them are executed.

Please describe the problem

Version
master, 4.5.

Platform
[ ] All
[ ] AntennaTracker
[ ] Copter
[ ] Plane
[ ] Rover
[ ] Submarine

Logs

$ colcon build --packages-up-to ardupilot_dds_tests
Starting >>> ardupilot_msgs
Finished <<< ardupilot_msgs [0.36s]                     
Starting >>> ardupilot_sitl
Finished <<< ardupilot_sitl [5.18s]                    
Starting >>> ardupilot_dds_tests
/home/ryan/.local/lib/python3.10/site-packages/setuptools/_distutils/dist.py:268: UserWarning: Unknown distribution option: 'tests_require'
  warnings.warn(msg)
--- stderr: ardupilot_dds_tests                   
/home/ryan/.local/lib/python3.10/site-packages/setuptools/_distutils/dist.py:268: UserWarning: Unknown distribution option: 'tests_require'
  warnings.warn(msg)
---
Finished <<< ardupilot_dds_tests [1.09s]

Summary: 3 packages finished [7.10s]
  1 package had stderr output: ardupilot_dds_tests
$ . install/setup.bash
$ colcon test --packages-select ardupilot_dds_tests --event-handlers=console_cohesion+
Starting >>> ardupilot_dds_tests
/home/ryan/.local/lib/python3.10/site-packages/setuptools/_distutils/dist.py:268: UserWarning: Unknown distribution option: 'tests_require'
  warnings.warn(msg)
--- output: ardupilot_dds_tests                   

----------------------------------------------------------------------
Ran 0 tests in 0.000s

OK
---
--- stderr: ardupilot_dds_tests

----------------------------------------------------------------------
Ran 0 tests in 0.000s

OK
---
Finished <<< ardupilot_dds_tests [0.33s]

Summary: 1 package finished [0.79s]
  1 package had stderr output: ardupilot_dds_tests
$ colcon test-result --all --verbose
Summary: 0 tests, 0 errors, 0 failures, 0 skipped

[Ryanf55]

ArduPilot is hosing the test environment.

Here, we install the apt version of setuptools

ardupilot/Tools/environment_install/install-prereqs-ubuntu.sh

Line 186 in 96fe3da

SITL_PKGS="libtool libxml2-dev libxslt1-dev ${PYTHON_V}-dev ${PYTHON_V}-pip ${PYTHON_V}-setuptools ${PYTHON_V}-numpy ${PYTHON_V}-pyparsing ${PYTHON_V}-psutil"

Then, this PR hoses the system install of setuptools with an ABI breaking version, and does it on the host OS.
#27689

This ticket still stands:
#26137

We need to be using a virtual environment if we are overwriting system installs with ABI breaking changes. It's not fair to developers who work outside of ArduPilot to overwrite the system packages with local ABI breaking versions .