community/py3-nats: upgrade to 2.9.0
https://github.com/nats-io/nats.py/releases/tag/v2.9.0
https://github.com/nats-io/nats.py/releases/tag/v2.8.0
Acknowledging there is !68447 (closed), but it seems to have become stale.
There was a rebuild error in 2.7.2 due to failed tests (loongarch64 log), the MR readjusts the list of skipped tests.
Edited by mio