fixed "bad level design" moment on third map

2 map(night and day): Updated stringtable and ran buildcubemaps.

Map 5(night and day): Fixed a softlock in the train finale where physics props were blocking the train.

Map 5 (Day version):

Removed an abusive ladder for Survivors.

Added a few more ladders for the Infected.

Update for the Scavenge second level: The horde script has been eased. More items and supplies have been added (including 2 guaranteed Vomit Jars!), and more items were added to the 2nd elevator event.

The second level AU: More items were added to the 2nd elevator event.

On both of these levels, Tanks and Witches no longer spawn during panic events!