cli: "no such host" error when starting CRDB on Mac

[andy-kimball]

Repro:
On Mac, start CRDB using this command line:

./cockroach start-single-node --insecure

EXPECTED: No error, the node should start.
ACTUAL: ERROR: failed to start server: invalid --advertise-addr: lookup AndyK-MacBook-Pro: no such host

This ping command fails on my Mac, and is presumably the reason why the host fails to resolve:

AndyK-MacBook-Pro:server andyk$ ping $(hostname)
ping: cannot resolve AndyK-MacBook-Pro: Unknown host

We should consider not using the default hostname if it doesn't resolve. Even if we can't do that for some reason, we should change the error so that it does not reference a flag that was not actually provided.

Jira issue: CRDB-8043

[github-actions]

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[andy-kimball]

This is not fixed, reopening.