[rset] replace entity cw_rset on .limit(inplace=True) will avoid pb if the entity is still referenced by some other entity relations cache. Closes #2065643 Also, drop '_resultset' from some test names on the way (redundant information, we're in ResultSetTC...)

drop_relation_definition('CWSourceSchemaConfig', 'cw_schema', 'CWAttribute')
sync_schema_props_perms('cw_schema')