[repository] fix edited_attributes management in multiple SET queries
entity.edited_attributes was messed up with previous edited entities.
The UpdateStep now gives a new fresh edited_attributes set to
repository.glob_update_entity() so that each entity can modify it
during its "transaction".
# type attribute might already be there if migrating from
# version < 3.5 to version >= 3.5.3, BaseTransition being added
# in bootstrap_migration
if versions_map['cubicweb'][0] >= (3, 5, 0):
add_attribute('BaseTransition', 'type')
sync_schema_props_perms('state_of')
sync_schema_props_perms('transition_of')