Fix camera name in RenderVar prim

[peterhorvath111]

Issue

AiSceneWrite exports a RenderVar.arnold:camera AOV reference using the sanitized USD path (e.g. /uv_camera__Sphere), but also authors primvars:arnold:name on the camera prim with the raw Arnold name (e.g. uv_camera__Sphere, no leading slash). On readback, the procedural renames the camera Arnold node to match primvars:arnold:name, so the AOV reference no longer resolves — Arnold core reports [aov] output references a non-camera node: /uv_camera__Sphere.

Fix

In libs/translator/writer/write_options.cpp:480, write the AOV's camera attribute using AiNodeGetName(output.camera) instead of GetArnoldNodeName(...), so the string matches the Arnold node name that will exist after readback. Fall back to GetArnoldNodeName only if the node has no name. This makes RenderVar.arnold:camera consistent with what ArnoldRenderOutput.arnold:camera already does and with how the render delegate (render_settings.cpp:796-798) resolves the camera at read time.

Issues fixed in this pull request
Fixes #2654