http: align OutgoingMessage and ClientRequest destroy

Added .destroyed property to OutgoingMessage and ClientRequest
to align with streams.

Fixed ClientRequest.destroy to dump res and re-use socket in agent
pool aligning it with abort.

PR-URL: https://github.com/nodejs/node/pull/32148


Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>