src: initialize inspector before RunBootstrapping()

This is necessary for `--inspect-brk-node` to work, and for the
inspector to be aware of scripts created before bootstrapping.

Fixes: https://github.com/nodejs/node/issues/32648
Refs: https://github.com/nodejs/node/pull/30467#discussion_r396879908

PR-URL: https://github.com/nodejs/node/pull/32672


Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Eugene Ostroukhov <eostroukhov@google.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: David Carlier <devnexen@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>