Refine AALOAD handling in OptimizationBasicInterpreter

See comment in test data for clarifications

 #KT-13289 Fixed

compiler/testData/codegen/box/coroutines/iterateOverArray.kt

@@ -0,0 +1,29 @@
+class Controller {
+    suspend fun suspendHere(x: Continuation<String>) {
+        x.resume("OK")
+    }
+}
+
+fun builder(coroutine c: Controller.() -> Continuation<Unit>) {
+    c(Controller()).resume(Unit)
+}
+
+fun box(): String {
+    val a = arrayOfNulls<String>(2) as Array<String>
+    a[0] = "O"
+    a[1] = "K"
+    var result = ""
+
+    builder {
+        for (s in a) {
+            // 's' variable must be spilled before suspension point
+            // And it's important that it should be treated as a String instance because of 'result += s' after
+            // But BasicInterpreter just ignores type of argument array for AALOAD opcode (treating it's return type as plain Object),
+            // so we should refine the relevant part in our intepreter
+            if (suspendHere() != "OK") throw RuntimeException("fail 1")
+            result += s
+        }
+    }
+
+    return result
+}