child_process: allow 'http_parser' monkey patching again

Lazy load _http_common and HTTPParser so that the 'http_parser' binding
can be monkey patched before any internal modules require it. This also
probably improves startup performance minimally for programs that never
require the HTTP stack.

Fixes: https://github.com/nodejs/node/issues/23716
Fixes: https://github.com/creationix/http-parser-js/issues/57

PR-URL: https://github.com/nodejs/node/pull/24006


Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>