Control-Flow Analysis: Reuse pseudo-value information for unused expression analysis

compiler/testData/diagnostics/testsWithStdLib/callableReference/function/unresolved.kt

@@ -1,3 +1,4 @@
+// !DIAGNOSTICS: -UNUSED_EXPRESSION
 class A
 
 fun main() {
@@ -8,4 +9,4 @@ fun main() {
     A::<!UNRESOLVED_REFERENCE!>bar<!>
     
     <!UNRESOLVED_REFERENCE!>B<!>::<!DEBUG_INFO_ELEMENT_WITH_ERROR_TYPE!>bar<!>
-}
+}