scene_viewer panics when given a gltf with a camera

[rparrett]

Bevy version

main 80f2ee2

Possibly broken by #11868 adding exposure settings to camera bundles?

Relevant system information

AdapterInfo { name: "Apple M1 Max", vendor: 0, device: 0, device_type: IntegratedGpu, driver: "", driver_info: "", backend: Metal }
SystemInfo { os: "MacOS 14.2.1 ", kernel: "23.2.0", cpu: "Apple M1 Max", core_count: "10", memory: "64.0 GiB" }

What you did

Exported a gltf (bistro outdoor exported as gltf in blender with camera export enabled)

cargo run --release --example scene_viewer -- ~/untitled.glb

What went wrong

2024-02-16T18:09:57.052459Z  INFO scene_viewer::scene_viewer_plugin: Spawning scene...
thread 'main' panicked at crates/bevy_scene/src/scene_spawner.rs:431:35:
scene contains the unregistered type `bevy_render::camera::camera::Exposure`. consider reflecting it with `#[derive(Reflect)]` and registering the type using `app.register_type::<T>()`
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
Encountered a panic in exclusive system `bevy_scene::scene_spawner::scene_spawner_system`!
Encountered a panic in system `bevy_app::main_schedule::Main::run_main`!
thread 'main' panicked at /Users/me/.cargo/registry/src/index.crates.io-6f17d22bba15001f/winit-0.29.10/src/platform_impl/macos/app_state.rs:387:33:
called `Result::unwrap()` on an `Err` value: PoisonError { .. }

[alice-i-cecile]

This is an extension of #11852. @cart, your call on if we block on this, or put a fix in a point release.