Meshes with dynamic GI mode have wrong lighting with lightmaps and Physical Light Units enabled

[atirut-w]

Tested versions

v4.2.1.stable.official [b09f793]

System information

Godot v4.2.1.stable - Windows 10.0.22621 - Vulkan (Forward+) - dedicated AMD Radeon RX 6700 XT (Advanced Micro Devices, Inc.; 31.0.23013.1023) - AMD Ryzen 7 5700X 8-Core Processor (16 Threads)

Issue description

Dynamic meshes do not properly receive lighting fromn lightmaps when PLU is enabled, resulting in very dark indirect lighting:

Steps to reproduce

1. Set up a scene with lightmaps and PLU enabled
2. Add a mesh and set its GI mode to dynamic

Minimal reproduction project (MRP)

Lightmap.zip