Optimise pinpointer activation significantly (#7169)

Content.Shared/Nuke/NukeDiskComponent.cs

@@ -0,0 +1,9 @@
+using Robust.Shared.GameStates;
+
+namespace Content.Shared.Nuke;
+
+/// <summary>
+/// Used for tracking the nuke disk - isn't a tag for pinpointer purposes.
+/// </summary>
+[RegisterComponent, NetworkedComponent]
+public sealed class NukeDiskComponent : Component {}