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.Client/GameObjects/EntitySystems/IconSmoothSystem.cs

@@ -21,7 +21,7 @@ namespace Content.Client.GameObjects.EntitySystems
     {
         [Dependency] private readonly IMapManager _mapManager = default!;
 
-        private readonly Queue<IEntity> _dirtyEntities = new Queue<IEntity>();
+        private readonly Queue<IEntity> _dirtyEntities = new();
 
         private int _generation;