Lint more const string prototypes (#18922)

Content.Shared/GameTicking/SharedGameTicker.cs

@@ -1,4 +1,4 @@
-using Robust.Shared.Network;
+using Content.Shared.Roles;
 using Robust.Shared.Replays;
 using Robust.Shared.Serialization;
 using Robust.Shared.Serialization.Markdown.Mapping;
@@ -13,7 +13,9 @@ namespace Content.Shared.GameTicking
         // See ideally these would be pulled from the job definition or something.
         // But this is easier, and at least it isn't hardcoded.
         //TODO: Move these, they really belong in StationJobsSystem or a cvar.
+        [ValidatePrototypeId<JobPrototype>]
         public const string FallbackOverflowJob = "Passenger";
+
         public const string FallbackOverflowJobName = "job-name-passenger";
 
         // TODO network.