Fix errors in unnatural water palettes

[ZeeMaji]

This fixes two errors in the orange & acid & pink water palettes where they were modifying colors beyond the water colors.

Firstly, pink tones 2-6 are changed to be the same as natural water on a new separate object. The pink colors in the original orange/acid water palettes seem to have been accidentally leftover from an earlier development version of the game's palette as they appear in some evo of RCT screenshots. For the sake of visual backwards compatibility i've split the objects here since this impacts the looks of old parks with these palettes. The old object has no changes to the pink tones but are marked as compat objects, the new objects have the error fixed.

Secondly, the third to last color (a weird unused blue color) has been changed to the same value it is in the natural & green water palettes. This color seems to be entirely unused which shouldn't affect any parks visually so i've unified it across all the objects, even the now compat marked ones.