Add gravitycomponent support to maps (#9857)

* Add gravitycomponent support to maps

The alert still needs fixing if you want planets.

* move

Content.Shared/Throwing/ThrowingSystem.cs

@@ -1,3 +1,4 @@
+using Content.Shared.Gravity;
 using Content.Shared.Interaction;
 using Content.Shared.Movement.Components;
 using Content.Shared.Tag;
@@ -16,6 +17,7 @@ public sealed class ThrowingSystem : EntitySystem
     /// </summary>
     public const float FlyTime = 0.15f;
 
+    [Dependency] private readonly SharedGravitySystem _gravity = default!;
     [Dependency] private readonly SharedInteractionSystem _interactionSystem = default!;
     [Dependency] private readonly ThrownItemSystem _thrownSystem = default!;
     [Dependency] private readonly TagSystem _tagSystem = default!;
@@ -23,7 +25,7 @@ public sealed class ThrowingSystem : EntitySystem
     /// <summary>
     ///     Tries to throw the entity if it has a physics component, otherwise does nothing.
     /// </summary>
-    /// <param name="entity">The entity being thrown.</param>
+    /// <param name="uid">The entity being thrown.</param>
     /// <param name="direction">A vector pointing from the entity to its destination.</param>
     /// <param name="strength">How much the direction vector should be multiplied for velocity.</param>
     /// <param name="user"></param>
@@ -97,10 +99,10 @@ public sealed class ThrowingSystem : EntitySystem
         if (user != null &&
             pushbackRatio > 0.0f &&
             physicsQuery.Value.TryGetComponent(user.Value, out var userPhysics) &&
-            user.Value.IsWeightless(userPhysics, entityManager: EntityManager))
+            _gravity.IsWeightless(user.Value, userPhysics))
         {
             var msg = new ThrowPushbackAttemptEvent();
-            RaiseLocalEvent(physics.Owner, msg, false);
+            RaiseLocalEvent(physics.Owner, msg);
 
             if (!msg.Cancelled)
                 userPhysics.ApplyLinearImpulse(-impulseVector * pushbackRatio);