net: do not manipulate potential user code

The error provided in this function could come from user code. Thus
the error should not be manipulated in any way. The added properties
do not seem to provide any actual value either as can not be part
of the error. The `hostname` is already set on the error and adding
the `host` property with the identical value does not seem right in
this case.

PR-URL: https://github.com/nodejs/node/pull/26751


Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>