Move some tests from boxWithStdlib/ to box/

Move those tests which do not require neither stdlib nor reflect

compiler/testData/codegen/box/arrays/inProjectionOfArray.kt

@@ -0,0 +1,10 @@
+fun box(): String {
+    val x : Array<Array<*>> = arrayOf(arrayOf(1))
+    val y : Array<in Array<String>> = x
+
+    if (y.size != 1) return "fail 1"
+
+    y[0] = arrayOf("OK")
+
+    return x[0][0] as String
+}