process: fix coverage generation

e8a26e78 added `process` to the
internal module wrapper. This broke the utility used to write
coverage information due to a SyntaxError that `process` had
already been declared.

PR-URL: https://github.com/nodejs/node/pull/17651


Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Timothy Gu <timothygu99@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Jon Moss <me@jonathanmoss.me>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>