Reduce manual actions/requirements for python_release
Changes:
- Add apt-release.sh and repository-release.sh, two scripts based on the aux ones used by python-release now but able to handle generic repository names.
- The repository-release.sh is able to clone the git repo from gerrit if not present on the build node.
- Add specific actions to scp the above files to the right hosts.
- Add a warning about checking the status of the repo directory on the build node.
Manually tested (not with a complete release though).
Bug: T367410
Closes T367410