[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/constructor/genericConstructor.kt

@@ -0,0 +1,22 @@
+// DONT_TARGET_EXACT_BACKEND: JS JS_IR JS_IR_ES6 WASM NATIVE
+// MODULE: lib
+// FILE: test/Foo.java
+
+package test;
+
+public class Foo<T extends Number> {
+    public Foo(T number) {}
+}
+
+// MODULE: main(lib)
+// FILE: 1.kt
+
+import test.Foo
+
+class Subclass : Foo<Int>(42) {
+}
+
+fun box(): String {
+    Subclass()
+    return "OK"
+}

compiler/testData/codegen/box/constructor/secondaryConstructor.kt

@@ -0,0 +1,51 @@
+// DONT_TARGET_EXACT_BACKEND: JS JS_IR JS_IR_ES6 WASM NATIVE
+// MODULE: lib
+// FILE: test/Foo.java
+
+package test;
+
+public class Foo {
+    private final String x;
+    private final String y;
+
+    public Foo(String x, String y) {
+        this.x = x;
+        this.y = y;
+    }
+
+    public Foo(String x) {
+        this(x, "def_y");
+    }
+
+    public Foo() {
+        this("def_x");
+    }
+
+    @Override
+    public String toString() {
+        return x + "#" + y;
+    }
+}
+
+// MODULE: main(lib)
+// FILE: 1.kt
+
+import test.Foo;
+
+class Child : Foo {
+    constructor(): super() {}
+    constructor(x: String): super(x) {}
+    constructor(x: String, y: String): super(x, y) {}
+}
+
+fun box(): String {
+    val c1 = Child().toString()
+    if (c1 != "def_x#def_y") return "fail1: $c1"
+
+    val c2 = Child("abc").toString()
+    if (c2 != "abc#def_y") return "fail2: $c2"
+
+    val c3 = Child("abc", "def").toString()
+    if (c3 != "abc#def") return "fail3: $c3"
+    return "OK"
+}