Share diagnostic severity configuration for C# and VB

src/Compilers/.editorconfig

@@ -3,14 +3,14 @@
 # Local functions are camelCase
 dotnet_naming_style.local_function_style.capitalization = camel_case
 
-# CSharp code style settings:
-[*.cs]
-csharp_style_var_for_built_in_types = false:none
-csharp_style_var_when_type_is_apparent = true:none
-csharp_style_var_elsewhere = false:none
-
 # RS0100: Statements must be placed on their own line
 dotnet_diagnostic.RS0100.severity = none
 
 # RS0102: Braces must not have blank lines between them
 dotnet_diagnostic.RS0102.severity = none
+
+# CSharp code style settings:
+[*.cs]
+csharp_style_var_for_built_in_types = false:none
+csharp_style_var_when_type_is_apparent = true:none
+csharp_style_var_elsewhere = false:none