Memory leak in distance fields with bDisableWorldRendering

There is a memory leak in the Distance Fields category when a mesh continuously moves through the world and the scene is being captured with bDisableWorldRendering set to true. This issue occurs on both Windows and Linux. A workaround is to leave bDisableWorldRendering to false, but this creates overhead from rendering the scene.

• Start with an empty world
• Spawn actors with USceneCaptureComponent and UStaticMeshComponent (seems to happen with any mesh, even /Engine/BasicShapes/Cube)
• Every tick, move the mesh actor and call UpdateSceneCaptureContents
• Run the game with `bDisableWorldRendering` to true
• select LLM Distance Fields in Unreal Insights and observe the memory usage increasing