Draft: feat: use resolveOverride cf property instead of updating the host

Tarun Khandelwalrequested to merge
use-resolveOverride into main

Instead of updating the host, using the resolveOverride cf property which is the recommended way of doing the proxy. ref: https://developers.cloudflare.com/workers/runtime-apis/request/#the-cf-property-requestinitcfproperties

For context see: https://gitlab.com/gitlab-org/cells/http-router/-/issues/56

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