[12336] Clarify code related to Wmo Liquids

(based on commit [12231] - dc6f670)

Conflicts:
	src/shared/revision_nr.h
[mt977] Fix loading LiquidType.dbc and missing mangos_string. Codestyle
[mt978] Transport Maps, Battlegrounds and JunkMaps that should be skipped on MoveMaps generation.
[mt979] Use gameobject collision bounding radius loaded from DBC on GetObjectBoundingRadius()