Mesh: Avoid computing corner normals for drawing if unnecessary

Only compute face corner normals if they are required for computing
tangents or if it's required because of the combination of sharp edges
and faces.

Pull Request: https://projects.blender.org/blender/blender/pulls/132821

source/blender/draw/intern/draw_cache_extract_mesh.cc

@@ -56,7 +56,10 @@ static void mesh_extract_render_data_node_exec(void *__restrict task_data)
   if (request_face_normals) {
     mesh_render_data_update_face_normals(mr);
   }
-  if ((request_corner_normals && !mr.use_simplify_normals) || force_corner_normals) {
+  if ((request_corner_normals && mr.normals_domain == bke::MeshNormalDomain::Corner &&
+       !mr.use_simplify_normals) ||
+      force_corner_normals)
+  {
     mesh_render_data_update_corner_normals(mr);
   }