Cleanup: EEVEE-Next: Use reference as suggested by MSVC

source/blender/draw/engines/eevee_next/eevee_light.cc

@@ -333,7 +333,7 @@ void LightModule::end_sync()
   /* This scene data buffer is then immutable after this point. */
   light_buf_.push_update();
 
-  for (auto key : deleted_keys) {
+  for (auto &key : deleted_keys) {
     light_map_.remove(key);
   }
 

source/blender/draw/engines/eevee_next/eevee_velocity.cc

@@ -273,7 +273,7 @@ void VelocityModule::end_sync()
     inst_.sampling.reset();
   }
 
-  for (auto key : deleted_obj) {
+  for (auto &key : deleted_obj) {
     velocity_map.remove(key);
   }