Expose both linear and logarithmic volume settings

I am wondering if we should have it accept something like

```rust
enum Volume {
    Logarithmic(f32),
    Linear(u8), // 255 is the 100%, 128 is 50% of the volume, etc.
}
```
instead of just `f32`.

_Originally posted by @harudagondi in https://github.com/bevyengine/bevy/pull/9480#pullrequestreview-1585782941_
            