K2: fix calculating property reference type in delegated setter

This commit is an accidentally forgotten part of the KT-61045 fix
#KT-61720 Fixed

compiler/testData/ir/irText/firProblems/delegatedSetterShouldBeSpecialized.kt

@@ -0,0 +1,9 @@
+// FIR_IDENTICAL
+// WITH_REFLECT
+// SKIP_SIGNATURE_DUMP
+
+var topLevelInt: Int = 0
+
+class MyClass {
+    var delegatedToTopLevel: Int by ::topLevelInt
+}