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/GasTileOverlaySystem.cs

@@ -24,7 +24,7 @@ namespace Content.Client.GameObjects.EntitySystems
         [Dependency] private readonly IMapManager _mapManager = default!;
         [Dependency] private readonly IResourceCache _resourceCache = default!;
 
-        private readonly Dictionary<float, Color> _fireCache = new Dictionary<float, Color>();
+        private readonly Dictionary<float, Color> _fireCache = new();
 
         // Gas overlays
         private readonly float[] _timer = new float[Atmospherics.TotalNumberOfGases];
@@ -42,7 +42,7 @@ namespace Content.Client.GameObjects.EntitySystems
         private readonly Texture[][] _fireFrames = new Texture[FireStates][];
 
         private readonly Dictionary<GridId, Dictionary<Vector2i, GasOverlayChunk>> _tileData =
-            new Dictionary<GridId, Dictionary<Vector2i, GasOverlayChunk>>();
+            new();
 
         private AtmosphereSystem _atmosphereSystem = default!;