Add additional output when MAAS hosted machines are reserved

[bladernr]

When reserving a system using a YAML file as we're going to be suggesting, this is the current output from testflinger-cli:

*** TESTFLINGER SYSTEM RESERVED ***
You can now connect to [[email protected]](mailto:[email protected])
Current time:           [2023-06-21T15:04:51.451849]
Reservation expires at: [2023-06-21T15:31:31.451873]
Reservation will automatically timeout in 1600 seconds
To end the reservation sooner use: testflinger-cli cancel cab62369-d0fc-484c-8ba7-0084c3edb649

First, I'd like to dump the machine name as well as the IP, so that first line would look like:

You can now connect to tadrock by ssh to [email protected]

Next, I'd like also a blurb that includes system make/model and the OS (and kernel, if specified in the YAML):

System: Dell PowerEdge R340
OS: Ubuntu 22.04 LTS GA Kernel

This is all information that the agent is aware of, as it does a maas <login> machine read <machine ID> when it begins provisioning. So it's already collected the hostname, and whatever make/model data, and it knows from the YAML if it's installing 22.04, 20.04, or whatevere (and the kernel if we've explicitly specified a kernel in the YAML).

Finally, I'm not sure why there's a mailto: link in the output...

the output would then look something like:

*** TESTFLINGER SYSTEM RESERVED ***
You can now connect to tadrock by ssh to [email protected]

System: Dell PowerEdge R340
Installed OS: Ubuntu 22.04 LTS GA Kernel

Current time:           [2023-06-21T15:04:51.451849]
Reservation expires at: [2023-06-21T15:31:31.451873]

Reservation will automatically timeout in 1600 seconds
To end the reservation sooner use: testflinger-cli cancel cab62369-d0fc-484c-8ba7-0084c3edb649

[fginther]

@bladernr This may have some overlap with #289. Instead of just dumping out the info you want to stdout, provide it via a CLI call.

[syncronize-issues-to-jira]

Thank you for reporting your feedback to us!

The internal ticket has been created: https://warthogs.atlassian.net/browse/CERTTF-475.

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