Add a test for the weightless status (#2437)

* Add wip test for weightless status

* Expand and fix weightless test

Content.Shared/GameObjects/Components/Mobs/SharedStatusEffectsComponent.cs

@@ -14,6 +14,8 @@ namespace Content.Shared.GameObjects.Components.Mobs
         public override string Name => "StatusEffectsUI";
         public override uint? NetID => ContentNetIDs.STATUSEFFECTS;
 
+        public abstract IReadOnlyDictionary<StatusEffect, StatusEffectStatus> Statuses { get; }
+
         public abstract void ChangeStatusEffectIcon(StatusEffect effect, string icon);
 
         public abstract void ChangeStatusEffect(StatusEffect effect, string icon, ValueTuple<TimeSpan, TimeSpan>? cooldown);