Fix #133764: Collada crash (editmode + triangulate + apply modifiers)

Exposed by bc0b86797c
(but even before we had Asserts in a debug build -- also crashed
WITH_ASSERT_ABORT OFF)

The call to ensure Mesh data from a mesh in edit mode needs
to happen before the triangulation which uses Mesh. This gets rid of
the crash and also previous asserts.

Pull Request: https://projects.blender.org/blender/blender/pulls/133859

source/blender/io/collada/collada_utils.cpp

@@ -285,14 +285,14 @@ Mesh *bc_get_mesh_copy(BlenderContext &blender_context,
 
   Mesh *mesh = BKE_mesh_copy_for_eval(*tmpmesh);
 
+  /* Ensure data exists if currently in edit mode. */
+  BKE_mesh_wrapper_ensure_mdata(mesh);
+
   if (triangulate) {
     bc_triangulate_mesh(mesh);
   }
   BKE_mesh_tessface_ensure(mesh);
 
-  /* Ensure data exists if currently in edit mode. */
-  BKE_mesh_wrapper_ensure_mdata(mesh);
-
   return mesh;
 }