Use the rangeManager's subdivisions in the obstruction manager shape tests
Completes an existing TODO. This is a large speedup in some cases for those test functions, particularly the "sunken ship lag" issue.
Patch By: temple
Reviewed By: elexis, mimo, bb, wraitii
Accepted By: bb, wraitii
Trac Tickets: #4713
Differential Revision: https://code.wildfiregames.com/D850