In compileSSHPolicy, when resolving other (non-autogroup:self)
destinations, the code discards the entire result on error via
`continue`. If a destination alias (e.g., a tag owned by a group
with a non-existent user) returns a partial IPSet alongside an
error, valid IPs are lost.
Both ACL compilation paths (compileFilterRules and
compileACLWithAutogroupSelf) already handle this correctly by
logging the error and using the IPSet if non-nil.
Remove the `continue` so the SSH path is consistent with the
ACL paths.
Fixes#2990
362696a5ef