Glab can not find Gitlab instance in case of gitlab_ssh_host setting
### Problem to solve
Our company Gitlab is running behind a reverse proxy. The git-ssh-connection is a direct connection to the Gitlab host. So the hostname for https to the Gitlab instance differs from ssh hostname. Our admin configured `gitlab_ssh_host` that the UI displays [two different urls](https://docs.gitlab.com/ee/administration/geo/replication/location_aware_git_url.html#configure-git-clone-urls-to-use-the-special-git-url). Everything is working fine.
But: If I auth against the correct Gitlab instance URL but check out a git repo via ssh glab is not able to match the other hostname to the stored credentials:
```bash
$ glab issue list
none of the git remotes configured for this repository points to a known GitLab host. Please use `glab auth login` to authenticate and configure a new host for glab
```
### Proposal
May be auth command can find out the alternative hostname for SSH or I can manual defined an alias.
### Further details
I'm not able to perform a auth against the direct ssh host.
### Links / references
* https://docs.gitlab.com/ee/administration/geo/replication/location_aware_git_url.html#configure-git-clone-urls-to-use-the-special-git-url
issue