Update: Replacing all cases of Pool.FreeList - non-controversial cases
This modifies the remaining(after previous 2 unsafe submissions) set of cases where we had FreeList(292 files) - they all either fall into FreeUnmanaged(don't implement IPooled) or Free(implements IPooled). The replacement has been done by constraining FreeList<T> with T : IPooled first, this revealed ~560 build errors which got fixed with FreeUnmanaged. Then all the remaining FreeLists that weren't producing an error should've been replaced with Free calls.
Tests: built all targets in Unity. Ran around on CraggyIsland in 2 player multiplayer (built a tiny house), checked bullet decals spawning/despawning properly.