Unable to extract string identifier information from Handle<Image>

## Bevy version

The release number or commit hash of the version you're using.

## \[Optional\] Relevant system information

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- 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
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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

Describe how you arrived at the problem. If you can, consider providing a code snippet or link.

Unable to extract the `source_path_id` or source path (such as where assets was loaded) for a `Handle`

```rust
fn image(&self) -> String {
let handle = &self.node.handle.clone();
let h = handle.to_owned().id();
match h {
HandleId::Id(id, num) => format!("{}", id.to_string()),
HandleId::AssetPathId(pathId) => {
let src = pathId.source_path_id();
format!("{}", src)
}
}
}
```

`SourcePathId` does not implement Display and has no `to_string` method.

## What went wrong

If it's not clear, break this out into:

- what were you expecting?
- what actually happened?

## Additional information

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

- screenshots
- logs
- theories about what might be going wrong
- workarounds that you used
- links to related bugs, PRs or discussions