Make release setup consistent among tutorials

[alaudrain]

The source .../setup.sh are inconsistent among the 4 main tutorials, sometimes using the latest release, sometimes the nightly:

• CLIC sim and reco: source /cvmfs/sw.hsf.org/key4hep/setup.sh
• ILD sim and reco: source /cvmfs/sw.hsf.org/key4hep/setup.sh
• CLIC event display: source /cvmfs/sw-nightlies.hsf.org/key4hep/setup.sh <= nightly used!
• Delphes: source /cvmfs/sw.hsf.org/key4hep/setup.sh

which lead us to a crash when trying to use the event display with a file generated in the ILD tutorial.

Proposed fix: change the setup of the event display tutorial to latest release instead of nightly.