Migrate boxWithJava tests to multi-file framework

compiler/testData/codegen/boxWithJava/properties/substituteJavaSuperField.kt

@@ -0,0 +1,15 @@
+// FILE: Test.java
+
+public abstract class Test<F> {
+    protected final F value = null;
+}
+
+// FILE: test.kt
+
+class A : Test<String>() {
+    fun foo(): String? = value
+}
+
+fun box(): String {
+    return if (A().foo() == null) "OK" else "Fail"
+}