Use 'new' expression in places where the type is evident for content (#2590)

* Content.Client

* Content.Benchmarks

* Content.IntegrationTests

* Content.Server

* Content.Server.Database

* Content.Shared

* Content.Tests

* Merge fixes

Co-authored-by: metalgearsloth <31366439+metalgearsloth@users.noreply.github.com>

Content.Server/GameTicking/GameRules/RuleSuspicion.cs

@@ -33,7 +33,7 @@ namespace Content.Server.GameTicking.GameRules
         [Dependency] private readonly IGameTicker _gameTicker = default!;
         [Dependency] private readonly IConfigurationManager _cfg = default!;
 
-        private readonly CancellationTokenSource _checkTimerCancel = new CancellationTokenSource();
+        private readonly CancellationTokenSource _checkTimerCancel = new();
 
         public override void Added()
         {