async_hooks: don't reuse resource in HttpAgent

As discussed in https://github.com/nodejs/diagnostics/issues/248,
https://github.com/nodejs/node/pull/21313 and
https://docs.google.com/document/d/1g8OrG5lMIUhRn1zbkutgY83MiTSMx-0NHDs8Bf-nXxM/preview
reusing the resource object is a blocker for landing a resource based
async hooks API and get rid of the promise destroy hook.

This PR ensures that HttpAgent uses the a new resource object in case
the socket handle gets reused.

PR-URL: https://github.com/nodejs/node/pull/27581


Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>