fix(commands/issue/create): remotes error on issue create
When an issue is created for a different repo which has no remote
in the current working git directory, it results in a remote not found
error.
This happens because cmdutils.LabelsPrompt
needs the remote name to cache the labels
in .git/config.
To fix that, we avoid caching the labels if there are no matching remotes.
Folow up to #446