Cura 8640 PyQt6 upgrade

[jellespijker]

In order to get this to work on our build-system and working for all three OSes we did a shit tons of boy scouting in our cmake. We removed old methods with variables and try to be consisted in a target-based approach. The idea is that we don't patch stuff down the line, but that the install should place everything in the correct path in a uniform way across all of Cura's dependencies.

These changes have been tested for the Cura team and not yet by the Styx team. Since we're merging to 5.0 instead of master I think we can continue with the PR anyway.

Most of the changes had to do with how dependency targets were named and to make sure that external projects weren't downloaded automatically.

Part of

• Cura 8640 PyQt6 upgrade libArcus#134
• Cura 8640 PyQt6 upgrade pynest2d#17
• Cura 8640 PyQt6 upgrade libSavitar#41
• Cura 8640 PyQt6 upgrade libnest2d#3
• Cura 8640 PyQt6 upgrade cura-binary-data#17
• Cura 8640 PyQt6 upgrade CuraEngine#1639
• Cura 8640 PyQt6 upgrade Uranium#804
• Cura 8640 PyQt6 upgrade Cura#11792
• [WIP] Cura 8640 PyQt6 upgrade cura-build-environment#126
• Cura 8640 PyQt6 upgrade cura-build#280
• ultimaker/cura-rundeck-jobs#1

Fixes

Todo

• Update Readme. But maybe best done in a separate ticket to prioritize with our other work for the 5.0 release
• We still have use PyQt5 in this dependency, this is the root cause of CURA-9120 UFP files do not contain preview png file. Since we can't expect the Styx team to update to PyQt6 adhoc and on short notice we need find away to support both PyQt5 for Styx and PyQt6 for Cura. I suggest we handle that in CURA-9120

[Ghostkeeper]

We'll merge this into 5.0 for our Cura's builds, but we'll make another PR to master since I'm no maintainer of this repository. Once that's done I'll ping the firmware team that maintains libCharon.