check argument types through complete phase

with right data flow info

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

@@ -0,0 +1,7 @@
+package aaa
+
+fun bar(<!UNUSED_PARAMETER!>a<!>: Int, <!UNUSED_PARAMETER!>b<!>: Int) {}
+
+fun foo(a: Int?) {
+    bar(a!!, a)
+}