Handle initializer case in FullyQualifiedSyntax

- Prevents source generators from fully qualifying names being assigned to within an object initializer
- Adds ResourceTextureWithInitializer test cases to ExportedFields and ExportedProperties

Co-Authored-By: Paul Joannon <437025+paulloz@users.noreply.github.com>
Co-Authored-By: Paviel Kraskoŭski <kraskovskiy94@gmail.com>

modules/mono/editor/Godot.NET.Sdk/Godot.SourceGenerators/ExtensionMethods.cs

@@ -212,11 +212,17 @@ namespace Godot.SourceGenerators
 
         private static void FullQualifiedSyntax(SyntaxNode node, SemanticModel sm, StringBuilder sb, bool isFirstNode)
         {
-            if (node is NameSyntax ns && (isFirstNode || node.Parent is not MemberAccessExpressionSyntax))
+            if (node is NameSyntax ns)
             {
-                SymbolInfo nameInfo = sm.GetSymbolInfo(ns);
-                sb.Append(nameInfo.Symbol?.ToDisplayString(FullyQualifiedFormatIncludeGlobal) ?? ns.ToString());
-                return;
+                bool isMemberAccess = !isFirstNode && node.Parent is MemberAccessExpressionSyntax;
+                bool isInitializer = isFirstNode && node.Parent is AssignmentExpressionSyntax { Parent: InitializerExpressionSyntax };
+
+                if (!isMemberAccess && !isInitializer)
+                {
+                    SymbolInfo nameInfo = sm.GetSymbolInfo(ns);
+                    sb.Append(nameInfo.Symbol?.ToDisplayString(FullyQualifiedFormatIncludeGlobal) ?? ns.ToString());
+                    return;
+                }
             }
 
             bool innerIsFirstNode = true;