[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/bridgesForOverriddenComplex.kt

@@ -0,0 +1,31 @@
+// DONT_TARGET_EXACT_BACKEND: JS JS_IR JS_IR_ES6 WASM NATIVE
+// MODULE: lib
+// FILE: JavaClass.java
+
+// KT-5912
+class JavaClass<T> {
+    public static interface Action<T> {
+        void call(T t);
+    }
+
+    public static class Some<T> {
+        public Some(T t) {
+        }
+    }
+
+    public static interface OnSubscribe<T> extends Action<Some<T>> {}
+
+    void perform(T t, OnSubscribe<T> subscribe) {
+        subscribe.call(new Some(t));
+    }
+}
+
+// MODULE: main(lib)
+// FILE: 1.kt
+
+// KT-5912
+fun box(): String {
+    var s = "Failt"
+    JavaClass<String>().perform("") { s = "OK" }
+    return s
+}