[All] Apps using common MainKratos.py

[jginternational]

Starting with #858 we are unifying the kratos launch script.
This is the list of applications that are currently updated to this policy

• Buoyancy
• Conjugate heat transfer
• Convection diffusion
• Embedded fluid
• CDEM
• DAM
• DEM
• DEM PFEM
• Fluid
• Fluid DEM
• FSI
• MPM
• PFEM Fluid
• PFEM Thermic
• Potential flow
• Shallow waters
• Structural
• MDPA generator
• Stent wizard
• Stenosis wizard

The last step, when all the apps follow the policy, is to remove the field main_launch_file from the app.json, and set it by default

[rubenzorrilla]

Just mentioning that we should update the wiki entries accordingly ASAP.

[jginternational]

@KratosMultiphysics/dem @KratosMultiphysics/dam
Check the issues related

#858

KratosMultiphysics/Kratos#9341

[joaquinirazabal]

The DamApp has been updated in:
#864
KratosMultiphysics/Kratos#9574