Fix pulling lerping (#4550)

Content.Shared/Movement/EntitySystems/SharedMoverSystem.cs

@@ -1,4 +1,5 @@
 using System.Diagnostics.CodeAnalysis;
+using System.Linq;
 using Content.Shared.MobState;
 using Content.Shared.Movement.Components;
 using Robust.Shared.Containers;
@@ -49,7 +50,7 @@ namespace Content.Shared.Movement.EntitySystems
 
             if (owner != null && session != null)
             {
-                foreach (var comp in owner.GetAllComponents<IRelayMoveInput>())
+                foreach (var comp in owner.GetAllComponents<IRelayMoveInput>().ToArray())
                 {
                     comp.MoveInputPressed(session);
                 }

Content.Shared/Movement/SharedMoverController.cs

@@ -152,6 +152,8 @@ namespace Content.Shared.Movement
         {
             return body.BodyStatus == BodyStatus.OnGround &&
                    body.Owner.HasComponent<IMobStateComponent>() &&
+                   // If we're being pulled then don't mess with our velocity.
+                   (!body.Owner.TryGetComponent(out SharedPullableComponent? pullable) || !pullable.BeingPulled) &&
                    _blocker.CanMove(body.Owner);
         }