Slight trigger refactor (#4320)

* Trigger tweaks

* Finish trigger refactor

* Clusterflash too

Content.Server/Explosion/Components/SoundOnTriggerComponent.cs

@@ -0,0 +1,20 @@
+using Content.Shared.Sound;
+using Robust.Shared.GameObjects;
+using Robust.Shared.Serialization.Manager.Attributes;
+using Robust.Shared.ViewVariables;
+
+namespace Content.Server.Explosion.Components
+{
+    /// <summary>
+    /// Whenever a <see cref="TriggerEvent"/> is run play a sound in PVS range.
+    /// </summary>
+    [RegisterComponent]
+    public sealed class SoundOnTriggerComponent : Component
+    {
+        public override string Name => "SoundOnTrigger";
+
+        [ViewVariables(VVAccess.ReadWrite)]
+        [DataField("sound")]
+        public SoundSpecifier? Sound { get; set; } = null;
+    }
+}