Run icub-training smoke testing with conda binaries

[traversaro]

It should be possible to run icub training smoke testing (i.e. https://github.com/icub-training/icub-training.github.io/wiki/SW-Installation#-check-your-installation) with conda binaries, i.e. :

mamba create -n vvv -c conda-forge -c robotology yarp icub-models gazebo gazebo-yarp-plugins icub-contrib-common qt=5.12.9=*_4 compilers bash git
mamba activate vvv
git clone https://github.com/vvv-school/tutorial_cartesian-interface.git
cd tutorial_cartesian-interface/smoke-test
./test.sh

However, at the moment this does not work for this problems:

• /lib/robottestingframework` is not added to `LD_LIBRARY_PATH`/`DYLD_LIBRARY_PATH`/`PATH`, resulting in `yarpmanager.so` not found errors
• The iCub model is not spawned

[traversaro]

The iCub model is not spawned

This is actually due to https://github.com/robotology/robotology-superbuild/issues/1563 .

[traversaro]

FYI @xela-95