TST: update tests for server issue https://gitlab.com/caosdb/caosdb-server/-/issues/136

Summary

Update tests for update tests for server issue https://gitlab.com/caosdb/caosdb-server/-/issues/136 after changes in caosdb-server!72 (merged)

Focus

The xfail test indicates another bug in caosdb-pylib: https://gitlab.com/caosdb/caosdb-pylib/-/issues/81 which hides the correct server message because the client tries to parse a list value into a non-list datatype.