lib: deprecate _stream_wrap

Its unused by node, and doesn't have a reasonable use outside of node.

See: https://github.com/nodejs/node/pull/25153
See: https://github.com/nodejs/node/pull/16158

PR-URL: https://github.com/nodejs/node/pull/26245


Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>