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/GameObjects/EntitySystems/PointingSystem.cs

@@ -40,7 +40,7 @@ namespace Content.Server.GameObjects.EntitySystems
         ///     A dictionary of players to the last time that they
         ///     pointed at something.
         /// </summary>
-        private readonly Dictionary<ICommonSession, TimeSpan> _pointers = new Dictionary<ICommonSession, TimeSpan>();
+        private readonly Dictionary<ICommonSession, TimeSpan> _pointers = new();
 
         private const float PointingRange = 15f;