Fix T101926: Curves: Remove type-specific attributes when deleting

Remove NURBS or Bezier specific attributes after removing points or
curves. In theory we could avoid copying those attributes in the
first place, but that doesn't seem worth the extra complexity here,
since we don't necessarily know the result curve type counts before
copying attributes.

source/blender/blenkernel/intern/curves_geometry.cc

@@ -1224,6 +1224,10 @@ static CurvesGeometry copy_with_removed_points(const CurvesGeometry &curves,
     attribute.dst.finish();
   }
 
+  if (new_curves.curves_num() != curves.curves_num()) {
+    new_curves.remove_attributes_based_on_types();
+  }
+
   return new_curves;
 }
 
@@ -1329,6 +1333,8 @@ static CurvesGeometry copy_with_removed_curves(const CurvesGeometry &curves,
     attribute.dst.finish();
   }
 
+  new_curves.remove_attributes_based_on_types();
+
   return new_curves;
 }