GLTF Mesh Import: Unable to use the same GLB model for physics

[AtlasLinden]

Environment

Second Life Project 7.1.14.15976006598 (GLTF Mesh Import)

Description

A GLB used for Physics cannot be applied if it matches LOD_HIGH in the mesh importer.
This is not the case when using a DAE file for physics.

Reproduction steps

Use the cube files mentioned in #4157 as these all have an identical shape: https://github.com/user-attachments/files/20431144/Cubes.zip

1. Select to upload a cube GLB file
2. For the physics model, select From file in the drop down
3. Click Browse and select the same GLB file
4. Observe no Physics shown in preview. Log will also mention No physics model specified for Cube
5. Repeat the above but initially select a cube DAE file (which will use a GLB physics file)