[K/N] Transform FunctionReference without bound values to ConstantValue

kotlin-native/backend.native/tests/runtime/exceptions/custom_hook.kt

@@ -8,8 +8,9 @@ import kotlin.native.concurrent.*
 import kotlin.native.internal.*
 
 fun mainLegacyMM() {
+    val wrong = "wrong"
     assertFailsWith<InvalidMutabilityException> {
-        setUnhandledExceptionHook { _ -> println("wrong") }
+        setUnhandledExceptionHook { _ -> println(wrong) }
     }
 
     val x = 42

kotlin-native/backend.native/tests/runtime/workers/worker9.kt

@@ -49,14 +49,16 @@ fun withLock(op: () -> Unit) {
         }
     } else {
         assertFailsWith<IllegalStateException> {
+            val message = "shall not happen"
             worker.executeAfter {
-                println("shall not happen")
+                println(message)
             }
         }
     }
     assertFailsWith<IllegalArgumentException> {
+        val message = "shall not happen"
         worker.executeAfter(-1, {
-            println("shall not happen")
+            println(message)
         }.freeze())
     }