[Test] Properly merge box against java testdata into codegen/box

Previous commit about it was 3199ce03 and it was completely wrong

compiler/testData/codegen/box/sam/kt4753.kt

@@ -0,0 +1,21 @@
+// DONT_TARGET_EXACT_BACKEND: JS JS_IR JS_IR_ES6 WASM NATIVE
+// MODULE: lib
+// FILE: Base.java
+
+interface Base<T> {
+    void call(T t);
+}
+
+// FILE: Derived.java
+
+interface Derived extends Base<String> {
+}
+
+// MODULE: main(lib)
+// FILE: 1.kt
+
+fun box(): String {
+    Base<String>{}.call("")
+    Derived{}.call("")
+    return "OK"
+}