Separate "thank you" messages from general ads (#25867)

* Separated "thank you" messages from general ads

* Moved MessagePackPrototype to shared, cleaned up AdvertiseComponent, and actually killed AdvertisementsPackPrototype.
+More suggests changes.

* Rename PackPrototypeID to Pack in both components.

Content.Shared/VendingMachines/VendingMachineComponent.cs

@@ -51,8 +51,6 @@ namespace Content.Shared.VendingMachines
 
         public bool Broken;
 
-        public bool ShouldSayThankYou;
-
         /// <summary>
         /// When true, will forcefully throw any object it dispenses
         /// </summary>