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/Disposal/DisposalRouterComponent.cs

@@ -36,7 +36,7 @@ namespace Content.Server.GameObjects.Components.Disposal
         public override string Name => "DisposalRouter";
 
         [ViewVariables]
-        private readonly HashSet<string> _tags = new HashSet<string>();
+        private readonly HashSet<string> _tags = new();
 
         [ViewVariables]
         public bool Anchored =>