Slight trigger refactor (#4320)

* Trigger tweaks

* Finish trigger refactor

* Clusterflash too

Content.Server/Explosion/Components/TriggerOnCollideComponent.cs

@@ -0,0 +1,10 @@
+using Robust.Shared.GameObjects;
+
+namespace Content.Server.Explosion.Components
+{
+    [RegisterComponent]
+    public class TriggerOnCollideComponent : Component
+    {
+        public override string Name => "TriggerOnCollide";
+    }
+}