Add newly introduced modifiers to our csharp_preferred_modifier_order editorconfig (#86668)

Author: jkoritzinsky

.editorconfig

@@ -36,7 +36,7 @@ csharp_indent_switch_labels = true
 csharp_indent_labels = one_less_than_current
 
 # Modifier preferences
-csharp_preferred_modifier_order = public,private,protected,internal,static,extern,new,virtual,abstract,sealed,override,readonly,unsafe,volatile,async:suggestion
+csharp_preferred_modifier_order = public,private,protected,internal,file,static,extern,new,virtual,abstract,sealed,override,readonly,unsafe,required,volatile,async:suggestion
 
 # avoid this. unless absolutely necessary
 dotnet_style_qualification_for_field = false:suggestion

src/libraries/System.Runtime.InteropServices/gen/Microsoft.Interop.SourceGeneration/Marshalling/ElementsMarshalling.cs

@@ -58,7 +58,7 @@ public StatementSyntax GenerateClearUnmanagedValuesSource(TypePositionInfo info,
     }
 
 #pragma warning disable SA1400 // Access modifier should be declared https://github.com/DotNetAnalyzers/StyleCopAnalyzers/issues/3659
-    static file class ElementsMarshallingCollectionSourceExtensions
+    file static class ElementsMarshallingCollectionSourceExtensions
 #pragma warning restore SA1400 // Access modifier should be declared
     {
         public static StatementSyntax GetNumElementsAssignmentFromManagedValuesSource(this IElementsMarshallingCollectionSource source, TypePositionInfo info, StubCodeContext context)

src/libraries/System.Runtime.InteropServices/gen/Microsoft.Interop.SourceGeneration/Marshalling/UnmanagedToManagedOwnershipTrackingStrategy.cs

@@ -169,7 +169,7 @@ IEnumerable<StatementSyntax> GenerateStatementsFromInner(StubCodeContext context
     }
 
 #pragma warning disable SA1400 // Access modifier should be declared https://github.com/DotNetAnalyzers/StyleCopAnalyzers/issues/3659
-    sealed file record OwnedValueCodeContext : StubCodeContext
+    file sealed record OwnedValueCodeContext : StubCodeContext
 #pragma warning restore SA1400 // Access modifier should be declared
     {
         private readonly StubCodeContext _innerContext;
@@ -197,7 +197,7 @@ public override (string managed, string native) GetIdentifiers(TypePositionInfo
     }
 
 #pragma warning disable SA1400 // Access modifier should be declared https://github.com/DotNetAnalyzers/StyleCopAnalyzers/issues/3659
-    static file class OwnershipTrackingHelpers
+    file static class OwnershipTrackingHelpers
 #pragma warning restore SA1400 // Access modifier should be declared
     {
         public const string OwnOriginalValueIdentifier = "ownOriginal";