fix: Ensure linear volume subtraction does not go below zero (#19423)

fix: [Ensure linear volume subtraction does not go below zero
](https://github.com/bevyengine/bevy/issues/19417)

## Solution
- Clamp the result of linear volume subtraction to a minimum of 0.0
- Add a new test case to verify behavior when subtracting beyond zero

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Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com>
Co-authored-by: Jan Hohenheim <jan@hohenheim.ch>