Generate packet offsets for versioned messages (#19138)

* Add support for generating packet offsets for new versioned message

* Remove outdated test

* match over version

sdk/program/src/message/mod.rs

@@ -5,6 +5,7 @@ mod v0;
 mod versions;
 
 pub use legacy::Message;
+pub use versions::MESSAGE_VERSION_PREFIX;
 
 pub const MESSAGE_HEADER_LENGTH: usize = 3;