add whitelist support for slow contacts (#11647)

Content.Shared/Movement/Components/SlowContactsComponent.cs

@@ -1,3 +1,4 @@
+using Content.Shared.Whitelist;
 using Robust.Shared.GameStates;
 using Robust.Shared.Serialization;
 
@@ -11,6 +12,9 @@ public sealed class SlowContactsComponent : Component
 
     [ViewVariables, DataField("sprintSpeedModifier")]
     public float SprintSpeedModifier { get; set; } = 1.0f;
+
+    [DataField("ignoreWhitelist")]
+    public EntityWhitelist? IgnoreWhitelist;
 }
 
 [Serializable, NetSerializable]

Content.Shared/Movement/Systems/SlowContactsSystem.cs

@@ -1,7 +1,6 @@
 using Content.Shared.Movement.Components;
 using Robust.Shared.GameStates;
 using Robust.Shared.Physics.Components;
-using Robust.Shared.Physics.Dynamics;
 using Robust.Shared.Physics.Events;
 using Robust.Shared.Physics.Systems;
 
@@ -76,6 +75,9 @@ public sealed class SlowContactsSystem : EntitySystem
             if (!TryComp<SlowContactsComponent>(ent, out var slowContactsComponent))
                 continue;
 
+            if (slowContactsComponent.IgnoreWhitelist != null && slowContactsComponent.IgnoreWhitelist.IsValid(ent))
+                continue;
+
             walkSpeed = Math.Min(walkSpeed, slowContactsComponent.WalkSpeedModifier);
             sprintSpeed = Math.Min(sprintSpeed, slowContactsComponent.SprintSpeedModifier);
             remove = false;