[TEST] Migrate duplicating javac tests to new test runners

Also minimize scope of DiagnosticUsingJavac tests to
 `compiler/testData/diagnostics/tests/javac`. This is fine since
 javac compilation mode is still not finished and no one not going to
 support it

compiler/testData/diagnostics/tests/javac/inheritance/IheritanceOfInner.kt

@@ -0,0 +1,20 @@
+// FIR_IDENTICAL
+// FILE: a/d.java
+package a;
+
+public class d<T> {
+
+    public static class Inner<X> extends d<Integer> {
+
+        public class Y<C> extends d.Inner<String> {
+
+            public class Z<Z> extends d.Inner<String>.Y<Integer> {
+
+                public class N<N> extends d.Inner<Integer>.Y<Double>.Z<Integer> {}
+            }
+
+        }
+
+    }
+
+}