Fire extinguisher safety (#4912)

* Moved safety into FireExtinguisherComponent.

* Fix errant find and replace

* Address reviews

Co-authored-by: metalgearsloth <comedian_vs_clown@hotmail.com>

Content.Shared/Fluids/SharedSprayComponent.cs

@@ -10,8 +10,8 @@ namespace Content.Shared.Fluids
     }
 
     [Serializable, NetSerializable]
-    public enum SprayVisuals
+    public enum SprayVisuals : byte
     {
-        Safety,
+        Safety
     }
 }