Turn off suggestions that are inconsistent with general style in the repo

Author: AArnott

src/.editorconfig

@@ -49,8 +49,8 @@ dotnet_style_explicit_tuple_names = true:suggestion
 [*.cs]
 # Prefer "var" everywhere
 csharp_style_var_for_built_in_types = false:none
-csharp_style_var_when_type_is_apparent = true:suggestion
-csharp_style_var_elsewhere = false:suggestion
+csharp_style_var_when_type_is_apparent = true:none
+csharp_style_var_elsewhere = false:none
 
 # Prefer method-like constructs to have a block body
 csharp_style_expression_bodied_methods = true:suggestion