http: prevent aborted event when already completed

When socket is closed on a response for a request that is being piped to
a stream there is a condition where aborted event will be fired to http
client when socket is closing and the incomingMessage stream is still
set to readable.

We need a check for request being complete and to only raise the
'aborted' event on the http client if we have not yet completed reading
the response from the server.

Fixes: https://github.com/nodejs/node/issues/18756

PR-URL: https://github.com/nodejs/node/pull/18999


Reviewed-By: Shingo Inoue <leko.noor@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>