nb completion printings

[shirady]

Environment info

CLI version: 5.13.0 noobaa-image: noobaa/noobaa-core:master-20220913 operator-image: noobaa/noobaa-operator:5.13.0

Actual behavior

1. Prints the script "under the hood"
2. I'm not sure it works

Expected behavior

1. Prompt back (Shell convention for success) or success message + how to use.
2. Ability to complete noobaa functions

Steps to reproduce

1. Based on the instructions here - the steps of ‘Build images’ and ‘Deploy noobaa’.
2. nb completion
3. Use tab to complete the command, for example, nb acc + tab in order to complete nb account

More information - Screenshots / Logs / Other output