Use decibel scaling for volume control (version 2)

[myQwil]

An alternative approach to #31493

Meant to work alongside ppy/osu-framework#6515

This approach works under the philosophy of implementing decibel scaling right at the slider/meter level. As a result, it makes far fewer changes to osu-framework, and decibel scaling is not forced on the developer the same way that it was with the first version.

Here is a video showing that our decibel scaling matches PulseAudio's decibel scaling:

game.mp4

During the workflow run, MouseWheelVolumeAdjust tests fail. This is due to the volume's precision level not being high enough. When the precision level is increased, these tests pass:

test.mp4