Light2D causes memory leak when unloading scene with UnloadSyncAsync

How to reproduce:

1. Open the attached "IN-144029" project
2. Open the SampleScene
3. Open the Profiler. Window >Analysis> Profiler
4. Enter Play mode
5. Observe the Memory Profiler and see initial memory usage
6. Hold spacebar for 30-70 seconds
7. Observe the Memory Profiler and see how memory usage changed

Actual Result: Light2D does not destroy runtime created mesh, causing a memory leak
Expected result: Light2D destroys runtime created mesh

Reproducible with: 6000.0.0f1, 6000.0.76f1, 6000.3.16f1, 6000.4.9f1, 6000.5.0b10, 6000.6.06a

Reproducible on: MacOS 26.5 (M1), Windows 11 (reported)
Not reproducible on: No other environments tested