Object not facing correct axis with .looking_at()

## Bevy version

0.9.1

## \[Optional\] Relevant system information

If you cannot get Bevy to build or run on your machine, please include:

- the Rust version you're using (you can get this by running `cargo --version`)
- Bevy relies on the "latest stable release" of Rust
- nightly should generally work, but there are sometimes regressions: please let us know!
- the operating system or browser used, including its version
- e.g. Windows 10, Ubuntu 18.04, iOS 14

If your bug is rendering-related, copy the adapter info that appears when you run Bevy.

```ignore
`AdapterInfo { name: "NVIDIA GeForce RTX 2070", vendor: 4318, device: 7938, device_type: DiscreteGpu, backend: Vulkan }`
```

You should also consider testing the examples of our upstream dependencies to help isolate any setup-specific issue:

- [`wgpu`](https://github.com/gfx-rs/wgpu) for rendering problems
- [`winit`](https://github.com/rust-windowing/winit) for input and window management
- [`gilrs`](https://docs.rs/gilrs/latest/gilrs/) for gamepad inputs

## What you did

Minimal code example with blender and gltf file provided for convenience: https://github.com/dmyyy/camera_test

## What went wrong

- Blender asset is exported facing the -y-axis in Blender as a gltf
- Camera is located on -z-axis (0,5,-10) looking at the +z-axis (0,0,5)
- Object defaults to looking away from the camera (that is located on the -z-axis) (spawn object at 0,0,0 and don't rotate)
- Tell the object to look at the -z-axis (0,0,-100)

Expected: Object looks at the camera (located on the -z-axis)

Actual: Object orientation doesn't change

## Additional information

Other information that can be used to further reproduce or isolate the problem.
This commonly includes:

Start by running the linked camera_test reproduction with Bevy 0.9.1 and inspect the .looking_at() entry point alongside the Blender/glTF asset orientation. Compare the object's and camera's reported axes and transforms for the stated positions. Done means the object faces the camera after looking at (0,0,-100), with the behavior verified against the reproduction.

Written by the indexing model from the issue text.