EntitySystemMessage Removal & InteractionSystem directed events (#3572)

* Removed obsolete EntitySystemMessage, now everything uses the base EntityEventArgs or the derived HandledEntityEventArgs.
Setup InteractionSystem to use new directed events.

* Update Submodule.

Content.Shared/Interfaces/GameObjects/Components/Interaction/IEquipped.cs

@@ -1,4 +1,4 @@
-#nullable enable
+#nullable enable
 using System;
 using Content.Shared.GameObjects.Components.Inventory;
 using JetBrains.Annotations;
@@ -45,13 +45,8 @@ namespace Content.Shared.Interfaces.GameObjects.Components
     ///     Raised when equipping the entity in an inventory slot.
     /// </summary>
     [PublicAPI]
-    public class EquippedMessage : EntitySystemMessage
+    public class EquippedMessage : HandledEntityEventArgs
     {
-        /// <summary>
-        ///     If this message has already been "handled" by a previous system.
-        /// </summary>
-        public bool Handled { get; set; }
-
         /// <summary>
         ///     Entity that equipped the item.
         /// </summary>