trafficserver
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fix: ensure DNS resolution for parent proxy
HostDB restructure introduced a regression where DNS resolution for parent proxies would be skipped and the origin's address would be used instead.
It seems related to this diff: https://github.com/apache/trafficserver/commit/156528de4ce4d6bef2f2d2bc0963dadd9f122eec#diff-85a75d910dc93751ef5d568fc20fc73b01bfadac58844e88c7b8e68cedda0f0bL7636
Fixes: #8953
[approve ci autest]