Retain data flow info after binary calls

Make autocasts in CandidateResolver when checking value argument types

 #KT-2825 In Progress

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

@@ -0,0 +1,11 @@
+fun foo(a: Number): Int {
+    val result = (a as Int) compareTo a
+    a : Int
+    return result
+}
+
+fun bar(a: Number): Int {
+    val result = 42 compareTo (a as Int)
+    a : Int
+    return result
+}