do not return lambda parameter type as denotable in RefactoringUtil (IDEA-136617)

java/java-tests/testData/refactoring/extractMethod/ExtractUnresolvedLambdaExpression.java

@@ -0,0 +1,12 @@
+import java.util.function.Supplier;
+class Test {
+
+  private void a()
+  {
+    b(<selection>(s) -> {
+      System.out.println(s);
+    }</selection>);
+  }
+
+  void b(Supplier s) {}
+}