added info about smart casts to diagnostic tests

compiler/testData/diagnostics/tests/dataFlowInfoTraversal/BinaryExpressionIdentifier.kt

@@ -1,11 +1,11 @@
 fun foo(a: Number): Int {
-    val result = (a as Int) compareTo a
-    a : Int
+    val result = (a as Int) compareTo <!DEBUG_INFO_AUTOCAST!>a<!>
+    <!DEBUG_INFO_AUTOCAST!>a<!> : Int
     return result
 }
 
 fun bar(a: Number): Int {
     val result = 42 compareTo (a as Int)
-    a : Int
+    <!DEBUG_INFO_AUTOCAST!>a<!> : Int
     return result
 }