[JS IR] Add stdlib regression tests

js/js.translator/testData/box/regression/stdlibTestSnippets/iterableChunked.kt

@@ -0,0 +1,15 @@
+// EXPECTED_REACHABLE_NODES: 1750
+// KJS_WITH_FULL_RUNTIME
+
+fun box(): String {
+    val size = 2
+    val a = Array(size) { "$it" }
+    val data = Iterable { a.iterator() }
+
+    val dataChunked = data.chunked(size).single()
+    val expectedSingleChunk = data.toList()
+    if (expectedSingleChunk != dataChunked)
+        return "Fail"
+
+    return "OK"
+}