KT-3856 Wrong inner class inaccessible diagnostic for extension to outer class

#KT-3856 Fixed

compiler/testData/diagnostics/tests/scopes/inheritance/kt3856.kt

@@ -0,0 +1,33 @@
+fun foo(<!UNUSED_PARAMETER!>init<!>: A.() -> Unit) { }
+
+class A {
+    var x: Int = 0
+    companion object {
+        val f = foo() {
+            x = 1
+        }
+    }
+}
+
+class B(val a: String) {
+    fun f() = 0
+    companion object   {
+        fun B.bar() = a + f()
+    }
+}
+
+open class C {
+    fun bar() {}
+}
+
+class E: C() {
+
+    class D {
+        init {
+            with(C()) {
+                bar()
+                this.bar()
+            }
+        }
+    }
+}