don't use data flow info while checking for receiver

receiver with smart cast is checked separately

compiler/testData/diagnostics/tests/smartCasts/publicVal.kt

@@ -0,0 +1,10 @@
+public class A() {
+    public val foo: Int? = 1
+}
+
+fun Int.bar(i: Int) = i
+
+fun test() {
+    val p = A()
+    if (p.foo is Int) <!AUTOCAST_IMPOSSIBLE!>p.foo<!> bar 11
+}