Update the SA to re-query the database for the updated account after
deactivating it, and return this to the RA. Update the RA to pass this
value through to the WFE. Update the WFE to return this value, rather
than locally modifying the pre-deactivation account object, if it gets
one (for deployability).
Also remove the RA's requirement that the request object specify its
current status so that the request can be trimmed down to just an ID.
This proto change is backwards-compatible because the new
DeactivateRegistrationRequest's registrationID field has the same type
(int64) and field number (1) as corepb.Registration's id field.
Part of https://github.com/letsencrypt/boulder/issues/5554
ebf232cccb