test: add skipIfInspectorDisabled to debugger-pid

Currently this test will fail if node was configured --without-ssl.

PR-URL: https://github.com/nodejs/node/pull/12882


Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>