Enable writing JournalEntryV2RawEntry in v1.7.0

[tillrohrmann]

Enable writing the JournalEntryV2RawEntry in v1.7.0:

restate/crates/invoker-api/src/effects.rs

Lines 95 to 99 in 7493cd1

	// todo enable in v1.7.0
	// JournalEntryV2RawEntry {
	// command_index_to_ack,
	// raw_entry: raw_entry.into(),
	// }

.

[tillrohrmann]

@slinkydeveloper you took care of this as part of one your PRs, right?