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/DoAfter/DoAfterGui.cs

@@ -21,11 +21,11 @@ namespace Content.Client.GameObjects.EntitySystems.DoAfter
         [Dependency] private readonly IEyeManager _eyeManager = default!;
         [Dependency] private readonly IGameTiming _gameTiming = default!;
 
-        private readonly Dictionary<byte, PanelContainer> _doAfterControls = new Dictionary<byte, PanelContainer>();
-        private readonly Dictionary<byte, DoAfterBar> _doAfterBars = new Dictionary<byte, DoAfterBar>();
+        private readonly Dictionary<byte, PanelContainer> _doAfterControls = new();
+        private readonly Dictionary<byte, DoAfterBar> _doAfterBars = new();
 
         // We'll store cancellations for a little bit just so we can flash the graphic to indicate it's cancelled
-        private readonly Dictionary<byte, TimeSpan> _cancelledDoAfters = new Dictionary<byte, TimeSpan>();
+        private readonly Dictionary<byte, TimeSpan> _cancelledDoAfters = new();
 
         public IEntity? AttachedEntity { get; set; }
         private ScreenCoordinates _playerPosition;