Purge PhysicsMapComponent (#5766)

* Replace PhysicsMapComponent

- Dumb idea
- Lots of book-keeping and perf overhead.
- Much saner this way.

* stuff

* More work

* Purge

* Fixes

* Eh?

* Fixes

* Also this

* weh

* Fixes

* ice-cream

* Fix

* Fix stacking / gravity

* Gravity query

* MoveBuffer optimisations

* Fixes for test

* World gravity

* Fix build

* Avoid some transform resolves for contactless ents

* Less getcomps

* Fix contact caching

* Possibly less copies

* reh

* bulldoze

* Test "fix"

* seikrets

* a

* I saw this but now I decideded against it

* true

Robust.UnitTesting/RobustUnitTest.cs

@@ -53,12 +53,10 @@ namespace Robust.UnitTesting
                 typeof(MetaDataComponent),
                 typeof(TransformComponent),
                 typeof(PhysicsComponent),
-                typeof(PhysicsMapComponent),
                 typeof(BroadphaseComponent),
                 typeof(FixturesComponent),
                 typeof(JointComponent),
                 typeof(GridTreeComponent),
-                typeof(MovedGridsComponent),
                 typeof(JointRelayTargetComponent),
                 typeof(OccluderComponent),
                 typeof(OccluderTreeComponent),
@@ -66,7 +64,6 @@ namespace Robust.UnitTesting
                 typeof(LightTreeComponent),
                 typeof(CollisionWakeComponent),
                 typeof(CollideOnAnchorComponent),
-                typeof(Gravity2DComponent),
                 typeof(ActorComponent)
             };
 
@@ -125,7 +122,6 @@ namespace Robust.UnitTesting
 
             systems.LoadExtraSystemType<SharedGridTraversalSystem>();
             systems.LoadExtraSystemType<FixtureSystem>();
-            systems.LoadExtraSystemType<Gravity2DController>();
             systems.LoadExtraSystemType<CollisionWakeSystem>();
 
             if (Project == UnitTestProject.Client)