[dbapi] move ProgrammingError into cubicweb module
A new ``repoapi`` will be introduced as a replacement for the dbapi. It will
need ProgrammingError too.
Related to #2503918
change_attribute_type('CWCache', 'timestamp', 'TZDatetime')
change_attribute_type('CWUser', 'last_login_time', 'TZDatetime')
change_attribute_type('CWSource', 'latest_retrieval', 'TZDatetime')
drop_attribute('CWSource', 'synchronizing')
add_attribute('CWSource', 'in_synchronization')