KT-14294 for to stdlib to firstOrNull/lastOrNull: intention is absent if there is additional var before for loop

#KT-14294 Fixed

idea/testData/intentions/loopToCallChain/smartCasts/smartCastRequired6.kt

@@ -0,0 +1,16 @@
+// WITH_RUNTIME
+// IS_APPLICABLE: false
+// IS_APPLICABLE_2: false
+fun foo(list: List<Any>) {
+    var v: String?
+
+    v = null
+    <caret>for (o in list) {
+        if (bar(o as String)) {
+            v = o
+            break
+        }
+    }
+}
+
+fun bar(s: String): Boolean = true