NSFS | noobaa-cli Help format Update

[naveenpaul1]

Explain the changes

1. Noobaa CLI help output updated to below format for all the CLI commnds

node src/cmd/manage_nsfs upgrade --help 2>/dev/null
Help:

    'upgrade' noobaa-core command will initiate version upgrade and also return the upgrade status or history.

Usage:

    noobaa-cli upgrade <action> [flags]

List of actions supported:

    start
    status
    history
    

Issues: Fixed #xxx / Gap #xxx

1. NC | noobaa-cli Help Needs Update in action Part #8565

Testing Instructions:

1. run help command for all the CLI combinations.

Note : Doc is not updated for the MD5 changes

• Doc added/updated
• Tests added

This PR fixes only formatting issues, to update help doc a new issue is created. : #8595

[romayalon]

@naveenpaul1 when you put the issue under the fixes section you must have 'Fixed' keyword before so it'll close the issue automatically.
@shirady please review this PR, thanks in advance

[shirady]

I added comments and also mentioned other team member as I think we can improve and make it more accurate.

[shirady]

LGTM