Clean up SurgeParamConfig.h

[mkruselj]

For XT 2.0, we should strive to chuck out the last UI-to-engine bindings that are in SurgeParamConfig.h.

Additionally, clean up the relevant SVGs so that they don't have multiple things crammed in them that we then get to by offsetting frames. For example, the pitch slider has those extra notches for semitones. This should be a new component class in the skin definition itself, rather than taking bmp00154, row 3.

.asWhite should also just disappear as a consequence. Again just a new component class.

LFO EG sliders being smaller in height than other vertical sliders. Again just a new component class. It has no place being in bmp00105. (But this gets sorted out in the GUI redesign by and large, though.)

Unipolar vs bipolar slider variants? Same exact thing. One SVG per slider "type".

What does make sense is keeping the variants as frames, so - empty, has modulation assigned but not from currently selected modulator, modulation being assigned from current modulator - those should stay in the SVG.