Backport of cli: Fix a panic in deployment status
when scheduling is slow into release/1.3.x
#16032
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Backport
This PR is auto-generated from #16011 to be assessed for backporting due to the inclusion of the label backport/1.3.x.
The below text is copied from the body of the original PR.
Fixes #15235
If a deployment fails, the
deployment status
command can get a nil deployment when it checks for a rollback deployment if there isn't one (or at least not one at the time of the query). Fix the panic.Note that I'm intentionally punting on solving the old TODO here, as it'd just take too long for me to page all this code in. Dropping a quick panic fix was a small win between other tasks 😁