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/Components/ConfigurationComponent.cs

@@ -31,7 +31,7 @@ namespace Content.Server.GameObjects.Components
         [ViewVariables] private BoundUserInterface UserInterface => Owner.GetUIOrNull(ConfigurationUiKey.Key);
 
         [ViewVariables]
-        private readonly Dictionary<string, string> _config = new Dictionary<string, string>();
+        private readonly Dictionary<string, string> _config = new();
 
         private Regex _validation;