Merge boxWithStdlib testData into box, delete BoxWithStdlib test

compiler/testData/codegen/box/reified/newArrayInt.kt

@@ -0,0 +1,13 @@
+// WITH_RUNTIME
+
+inline fun<reified T> createArray(n: Int, crossinline block: () -> T): Array<T> {
+    return Array<T>(n) { block() }
+}
+
+fun box(): String {
+
+    val x = createArray<Int>(5) { 3 }
+
+    assert(x.all { it == 3 })
+    return "OK"
+}