Fix Z_CLEARANCE_FOR_HOMING for FLSUN Delta printer

[DerAndere1]

Description

This config had

#define Z_HOME_DIR 1
#define HOME_Z_FIRST
#define Z_CLEARANCE_FOR_HOMING 15

Theoretically this combo cannot work. Homing will

1. home Z to max
2. Raise Z for Z_CLEARANCE_FOR_HOMING (15mm)

Maybe I oversaw some special homing logic for DELTA printers that prevent the crash into Z max during homing. Or users of this printer always used G28 R0 instead of G28 as a workaround? Or this printer can move past the Zmax limit switch?

Benefits

prevent a crash into Z max during G28

Related Issues

#27370

[DerAndere1]

Indeed, I did not see that Delta printers have a special homing routine that prevents a crash