Add wipe_tower_type printer setting to replace vendor-based wipe tower selection

Previously, wipe tower behavior was determined by checking if the printer
  was a QIDI vendor. This introduces a configurable enum (Type 1 / Type 2)
  so any printer can select its wipe tower implementation. BBL printers
  remain hardcoded to Type 1. Qidi profiles default to Type 1.

src/slic3r/GUI/BackgroundSlicingProcess.cpp

@@ -681,7 +681,6 @@ StringObjectException BackgroundSlicingProcess::validate(StringObjectException *
     assert(m_print == m_fff_print);
 
     m_fff_print->is_BBL_printer() = wxGetApp().preset_bundle->is_bbl_vendor();
-	m_fff_print->is_QIDI_printer() = wxGetApp().preset_bundle->is_qidi_vendor();
     return m_print->validate(warning, collison_polygons, height_polygons);
 }