FE: add some more tests around static field fake overrides

compiler/testData/codegen/box/javaInterop/javaInterfaceFieldDirectAccess.kt

@@ -0,0 +1,20 @@
+// TARGET_BACKEND: JVM_IR
+// FILE: javapackage/PublicParentInterface.java
+
+package javapackage;
+
+public interface PublicParentInterface {
+    String publicStaticField = "OK";
+}
+
+// FILE: Child.kt
+
+import javapackage.PublicParentInterface
+
+class Child : PublicParentInterface {
+    fun foo(): String {
+        return PublicParentInterface.publicStaticField
+    }
+}
+
+fun box() = Child().foo()