Add cbbackupmgr log collection as an option to cao collect-logs

It would be helpful for Support if we could automate the procedure for collecting cbbackupmgr logs as outlined here in the docs, adding this as a new option for cao collect-logs.

Benefits:

1. It's currently a burden to the customer to manually create a job to attach a new pod to their existing backup volume, manually run commands to collect logs and upload them, and clean up afterwards.
2. The actual cbbackupmgr collect-logs command that the customer needs to run on the new pod can be complex and may require secret information meaning that Support can't simply give them a command to copy and run.
3. We can simplify collection of both CAO & backup logs and uploading to Support for analysis into one single fixed command for the customer to run.

In particular on point 2 above, where the customer is using a cloud object store for their backup archive, they need to pass CSP-specific authorization options, stored in a Kubernetes secret. The code to pass the relevant authorization to cbbackupmgr must already exist, as we already need to do so for regular backups/restores to work.