Fix VB to C# conversion for extension methods on properties passed by ref

* Add `HoistByRefDeclaration` overload in `ArgumentConverter` accepting `ExpressionSyntax` instead of `SimpleArgumentSyntax` to support generic expression hoisting.
* Update `NameExpressionNodeVisitor` to correctly detect when the receiver expression of an extension method needs to be passed by reference (e.g. properties, fields), and reuse the variable hoisting logic to correctly generate temporary variables for property modification before and after the method call.
* Add comprehensive test `TestExtensionMethodRefPropertyAsync` to ensure the generated C# code successfully extracts the property to a temporary variable for method calls.

Co-authored-by: GrahamTheCoder <2490482+GrahamTheCoder@users.noreply.github.com>

Author: google-labs-jules[bot]