[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/adapters/protectedFromBase.kt

@@ -0,0 +1,26 @@
+// DONT_TARGET_EXACT_BACKEND: JS JS_IR JS_IR_ES6 WASM NATIVE
+// MODULE: lib
+// FILE: JavaClass.java
+
+class JavaClass<T> {
+    protected void execute(T t, Runnable r) {
+        r.run();
+    }
+}
+
+// MODULE: main(lib)
+// FILE: 1.kt
+
+internal class KotlinClass : JavaClass<String>() {
+    fun doIt(): String {
+        var result = ""
+        execute("") {
+            result = "OK"
+        }
+        return result
+    }
+}
+
+fun box(): String {
+    return KotlinClass().doIt()
+}