Not all return codes are documented

[soslan]

Link to the issue (please include a link to the specific documentation or example):
https://github.com/kubernetes-client/python/blob/master/kubernetes/docs/BatchV1Api.md#create_namespaced_job
Description of the issue (please include outputs or screenshots if possible):
create_namespaced_job returns 409 Conflict if the job being created already exists, but the docs doesn't mention the code. Aren't all possible response codes meant to be documented?

[roycaihw]

This is a openapi spec issue that needs to be fixed in the upstream kubernetes/kubernetes#69014.