Fix #32219: Inconsistent influence of Units Scale on new objects

Made it so meshes, curves, surfaces and metaballs are scaling to a grid cell size,
which makes them behave consistently now.

There're still issues to be resolved still:

- Lattice is not scaled to grid cell size yet, it uses slightly different add
  function which makes scaling a bit tricky and hacky. Would prefer to do a
  bit bigger refactor here, so it's a TODO for now.

- Cameras, speakers and other helpers are not scaling. They don't have data
  on which scale could be applied and perhaps it should be some kind of draw
  scale. Also would consider it's a TODO for now.

source/blender/editors/include/ED_object.h

@@ -134,7 +134,8 @@ void ED_object_location_from_view(struct bContext *C, float loc[3]);
 void ED_object_rotation_from_view(struct bContext *C, float rot[3]);
 void ED_object_base_init_transform(struct bContext *C, struct Base *base, const float loc[3], const float rot[3]);
 float ED_object_new_primitive_matrix(struct bContext *C, struct Object *editob,
-                                     const float loc[3], const float rot[3], float primmat[][4]);
+                                     const float loc[3], const float rot[3], float primmat[][4],
+                                     int apply_diameter);
 
 void ED_object_add_generic_props(struct wmOperatorType *ot, int do_editmode);
 int ED_object_add_generic_get_opts(struct bContext *C, struct wmOperator *op,  float loc[3], float rot[3],