gz-sim-model: workaround cli11 bug

[scpeters]

🦟 Bug fix

Fixes #2918

Summary

There is a bug in cli11 for versions >= 2.2 and < 2.5. This works around the bug for the affected versions, similar to the approached identified by @j-rivero in #2910 (comment).

To test, I will run a colcon CI job on 24.04 (which has cli11 version 2.4.1) with vending of cli11 disabled by reverting gazebosim/gz-utils#178.

Test summary

• https://build.osrfoundation.org/job/ci__colcon_gpu_any-manual_ubuntu_noble_amd64/9/

--- output: gz-utils
...
-- Looking for CLI11 - found
...
83: [  PASSED  ] 8 tests.
 83/328 Test  #83: UNIT_ModelCommandAPI_TEST ...............................   Passed   15.53 sec

Full console output

83: Running main() from /tmp/ws/src/gz-sim/test/gtest_vendor/src/gtest_main.cc
83: [==========] Running 8 tests from 1 test suite.
83: [----------] Global test environment set-up.
83: [----------] 8 tests from ModelCommandAPI
83: [ RUN      ] ModelCommandAPI.NoServerRunning
83: Running command [/tmp/ws/install_isolated/gz-tools2/bin/gz model --list ]
83: [       OK ] ModelCommandAPI.NoServerRunning (5166 ms)
83: [ RUN      ] ModelCommandAPI.Commands
83: (2025-05-27 19:39:20.153) [error] [Physics.cc:845] Failed to find plugin [gz-physics-dartsim-plugin]. Have you checked the GZ_SIM_PHYSICS_ENGINE_PATH environment variable?
83: Running command [/tmp/ws/install_isolated/gz-tools2/bin/gz model --list]
83: Running command [/tmp/ws/install_isolated/gz-tools2/bin/gz model -m vehicle_blue]
83: Running command [/tmp/ws/install_isolated/gz-tools2/bin/gz model -m vehicle_blue --pose ]
83: Running command [/tmp/ws/install_isolated/gz-tools2/bin/gz model -m vehicle_blue --link]
83: Running command [/tmp/ws/install_isolated/gz-tools2/bin/gz model -m vehicle_blue --link caster]
83: Running command [/tmp/ws/install_isolated/gz-tools2/bin/gz model -m vehicle_blue --joint]
83: Running command [/tmp/ws/install_isolated/gz-tools2/bin/gz model -m vehicle_blue --joint caster_wheel]
83: [       OK ] ModelCommandAPI.Commands (6267 ms)
83: [ RUN      ] ModelCommandAPI.AirPressureSensor
83: Running command [/tmp/ws/install_isolated/gz-tools2/bin/gz model -m air_pressure_model -l link -s air_pressure_sensor]
83: [       OK ] ModelCommandAPI.AirPressureSensor (595 ms)
83: [ RUN      ] ModelCommandAPI.AltimeterSensor
83: (2025-05-27 19:39:26.848) [error] [Physics.cc:845] Failed to find plugin [gz-physics-dartsim-plugin]. Have you checked the GZ_SIM_PHYSICS_ENGINE_PATH environment variable?
83: Running command [/tmp/ws/install_isolated/gz-tools2/bin/gz model -m altimeter_model -l link -s altimeter_sensor]
83: [       OK ] ModelCommandAPI.AltimeterSensor (706 ms)
83: [ RUN      ] ModelCommandAPI.GpuLidarSensor
83: (2025-05-27 19:39:27.560) [error] [Physics.cc:845] Failed to find plugin [gz-physics-dartsim-plugin]. Have you checked the GZ_SIM_PHYSICS_ENGINE_PATH environment variable?
83: Running command [/tmp/ws/install_isolated/gz-tools2/bin/gz model -m gpu_lidar -l gpu_lidar_link -s gpu_lidar]
83: [       OK ] ModelCommandAPI.GpuLidarSensor (583 ms)
83: [ RUN      ] ModelCommandAPI.MagnetometerSensor
83: (2025-05-27 19:39:28.138) [error] [Physics.cc:845] Failed to find plugin [gz-physics-dartsim-plugin]. Have you checked the GZ_SIM_PHYSICS_ENGINE_PATH environment variable?
83: Running command [/tmp/ws/install_isolated/gz-tools2/bin/gz model -m magnetometer_model -l link -s magnetometer_sensor]
83: [       OK ] ModelCommandAPI.MagnetometerSensor (874 ms)
83: [ RUN      ] ModelCommandAPI.RgbdCameraSensor
83: (2025-05-27 19:39:29.016) [error] [Physics.cc:845] Failed to find plugin [gz-physics-dartsim-plugin]. Have you checked the GZ_SIM_PHYSICS_ENGINE_PATH environment variable?
83: Running command [/tmp/ws/install_isolated/gz-tools2/bin/gz model -m rgbd_camera -l rgbd_camera_link -s rgbd_camera]
83: [       OK ] ModelCommandAPI.RgbdCameraSensor (1129 ms)
83: [ RUN      ] ModelCommandAPI.ModelHelpVsCompletionFlags
83: Running command [/tmp/ws/install_isolated/gz-tools2/bin/gz model  --help]
83: Running command [bash -c ". /tmp/ws/src/gz-sim/src/cmd/model.bash_completion.sh; _gz_model_flags"]
83: [       OK ] ModelCommandAPI.ModelHelpVsCompletionFlags (166 ms)
83: [----------] 8 tests from ModelCommandAPI (15490 ms total)
83: 
83: [----------] Global test environment tear-down
83: [==========] 8 tests from 1 test suite ran. (15490 ms total)
83: [  PASSED  ] 8 tests.
 83/328 Test  #83: UNIT_ModelCommandAPI_TEST ...............................   Passed   15.53 sec

Checklist

• Signed all commits for DCO
• Added tests
• Updated documentation (as needed)
• Updated migration guide (as needed)
• Consider updating Python bindings (if the library has them)
• codecheck passed (See contributing)
• All tests passed (See test coverage)
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[iche033]

I haven't seen the UNIT_SystemLoader_TEST failures in the gz_sim-pr-cnlwin build before but they look unrelated.