Implements logs command

[exkson]

This PR implements logs command for ceph-devstack

Features

• dump logs of most recent run
• dump logs for specific run
• configurable dir through ceph-devstack config path
• support for specific job if there are many

[exkson]

Hello @VallariAg @zmc @amathuria here is my proposal for logs command implementation on ceph-devstack. Looking forward to your feedback.

[zmc]

Thank you for your submission! I like your approach overall. Aside from the specific comments I've made, I'd also like to point out the pathlib library that we use elsewhere in the project; it's quite an improvement over working with os.path!

[exkson]

Hello @zmc, I've applied the suggestions. I’d appreciate your feedback when you have a moment. Thanks!

[zmc]

Thanks for updating based on my feedback - these are good changes :)