Implement transfers out of ConsensusV2

[aschran]

We need to write ConsensusStreamEnded marker any time a consensus object is transferred out of consensus. (Right now this is only done when it's deleted or wrapped but not otherwise.)

Stacked on #21665

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[mystenmark]

Reviewed top commit only, since this appears to be a stack.

One suggestion + approved.

[mystenmark]

consider

match (
     &change.input_state,
     &change.output_state,
     &change.id_operation,
 ) {
     (
         ObjectIn::Exist((_, Owner::ConsensusV2 { .. })),
         ObjectOut::ObjectWrite((object_digest, Owner::ConsensusV2 { .. })),
         IDOperation::None,
     ) => None,
     (
         ObjectIn::Exist((_, Owner::ConsensusV2 { .. })),
         ObjectOut::ObjectWrite((object_digest, _)),
         IDOperation::None,
     ) => Some((*id, self.lamport_version, *object_digest)),
     _ => None,
 }

as a more future proof alternative

[aschran]

Can you elaborate on how this is more future-proof? If we introduce a new Owner type, there's no way of knowing in advance whether it will be a consensus type or a fastpath type.