Consider vendoring kjob and other binary dependencies #480
Description
When I tried the latest xpk 0.8.0, it requires https://github.com/kubernetes-sigs/kjob/blob/main/docs/installation.md, which I'm not sure how to install.
I think the best user experience can be achieved by bundling the desired version of kjob and other dependencies inside the xpk release published to PyPI. This way I just need to pip install xpk and everything works.