[bug] Fix "can_build" quantity (#11185) (#11188)

- Ignore virtual parts when considering "can_build" quantity
- Closes https://github.com/inventree/InvenTree/issues/11182

(cherry picked from commit 64acdd6ccf)

Co-authored-by: Oliver <oliver.henry.walters@gmail.com>

src/backend/InvenTree/part/models.py

@@ -1577,8 +1577,8 @@ class Part(
         if not self.has_bom:
             return 0
 
-        # Prefetch related tables, to reduce query expense
-        queryset = self.get_bom_items()
+        # Ignore virtual parts when calculating the "can_build" quantity
+        queryset = self.get_bom_items(include_virtual=False)
 
         # Ignore 'consumable' BOM items for this calculation
         queryset = queryset.filter(consumable=False)