Add complete end-to-end upgrade examples for production clouds

[samuelallan72]

We have some docs at https://canonical-charmed-openstack-upgrader.readthedocs-hosted.com/en/stable/how-to/upgrade-cloud/ for how to upgrade, but it's more of a reference collection. Ideally it would be good to add a full tutorial doc for upgrading a production cloud, including guidance on:

• steps (no bare cou upgrade; it will all be in stages)
• advice for upgrading hypervisors (including moving all VMs off a hypervisor, upgrading that, repeat with others)
• etc.

[syncronize-issues-to-jira[bot]]

Thank you for reporting us your feedback!

The internal ticket has been created: https://warthogs.atlassian.net/browse/SOLENG-830.

This message was autogenerated