Make callable references Serializable on JVM

#KT-11254 Fixed

compiler/testData/codegen/box/callableReference/serializability/reflectedIsNotSerialized.kt

@@ -0,0 +1,25 @@
+// IGNORE_BACKEND: JS
+// WITH_REFLECT
+
+import java.io.*
+import kotlin.test.*
+
+fun bar() {}
+
+fun box(): String {
+    val baos = ByteArrayOutputStream()
+    val oos = ObjectOutputStream(baos)
+    oos.writeObject(::bar)
+    oos.close()
+
+    val bais = ByteArrayInputStream(baos.toByteArray())
+    val ois = ObjectInputStream(bais)
+    val o = ois.readObject()
+    ois.close()
+
+    // Test that we don't serialize the reflected view of the reference: it's not needed because it can be restored at runtime
+    val field = kotlin.jvm.internal.CallableReference::class.java.getDeclaredField("reflected").apply { isAccessible = true }
+    assertNull(field.get(o))
+
+    return "OK"
+}