Rename 'minimum diameter' to maximum tower supported diameter
Rename 'minimum diameter' to maximum tower supported diameter

This new name indicates that:
- The setting is related to support at all.
- The setting is related to support towers.
- It's the maximum area that gets supported by a tower rather than normal support, which is the intent. Yes, it's also the minimum area that gets supported by normal support, but that's usually less relevant to know because the only reason for that is that it gets supported by a tower.

Contributes to issue CURA-6311.

Ultimaker/CuraEngine,Ultimaker/CuraEngine