[NI] fix approximation of not denotable types in lambda's function descriptors

compiler/testData/codegen/box/inference/integerLiteralTypeInLamdaReturnType.kt

@@ -0,0 +1,18 @@
+// !LANGUAGE: +NewInference
+// TARGET_BACKEND: JVM
+// WITH_RUNTIME
+
+class Foo<C : Any> {
+    fun test(candidates: Collection<C>): List<C> {
+        return candidates.sortedBy { 1 }
+    }
+}
+
+fun box(): String {
+    val foo = Foo<String>()
+
+    val list = listOf("OK")
+    val sorted = foo.test(list)
+
+    return list.first()
+}