IR KT-49372 cache progression loop parameters if their values can change

compiler/testData/codegen/box/ranges/forInDownTo/forInSumDownToSum.kt

@@ -0,0 +1,16 @@
+// WITH_RUNTIME
+
+fun test(): Int {
+    var sum = 0
+    for (i in sum downTo sum) {
+        sum += 1 + i
+    }
+    return sum
+}
+
+fun box(): String {
+    val t1 = test()
+    if (t1 != 1) return "Failed: t1=$t1"
+
+    return "OK"
+}