Make power grid check event force APCs off (#17935)

* replace query with enumerator

* remove unnecessary imports

* prevent from toggling APC during event

* all entity query i guess

Content.Server/StationEvents/Components/PowerGridCheckDisabledComponent.cs

@@ -0,0 +1,11 @@
+using Content.Server.StationEvents.Events;
+
+namespace Content.Server.StationEvents.Components;
+
+/// <summary>
+/// Added to APCs to prevent them from turning on until event end
+/// </summary>
+[RegisterComponent, Access(typeof(PowerGridCheckRule))]
+public sealed class PowerGridCheckDisabledComponent : Component
+{
+}