Light classes: do not rely on dummy context when data class autogenerated members conflict with declared members

Fix related issues with nested classes

compiler/testData/asJava/lightClasses/DelegatedNested.java

@@ -0,0 +1,13 @@
+public final class B {
+    public B() { /* compiled code */ }
+
+    public static final class A implements p.I {
+        private final p.I f;
+
+        public A(@org.jetbrains.annotations.NotNull p.I f) { /* compiled code */ }
+
+        public void f() { /* compiled code */ }
+
+        public void g() { /* compiled code */ }
+    }
+}