[web/request] clearly mark user_callback-related methods as deprecated
The deprecated decorator not only emits a warning at run-time
but above all makes the deprecation immediately apparent in the source.
closes #3567793.
sync_schema_props_perms('State')
sync_schema_props_perms('state_of')
sync_schema_props_perms('BaseTransition')
sync_schema_props_perms('Transition')
sync_schema_props_perms('WorkflowTransition')
sync_schema_props_perms('transition_of')