inspector: throw error when activating an already active inspector

When the user tries to activate the inspector that is already active
on a different port and host, we previously just silently reset
the port and host stored in the Environment without actually doing
anything for that to be effective. After this patch, we throw
an error telling the user to close the active inspector before invoking
`inspector.open()` again.

PR-URL: https://github.com/nodejs/node/pull/33015
Fixes: https://github.com/nodejs/node/issues/33012


Reviewed-By: Yongsheng Zhang <zyszys98@gmail.com>
Reviewed-By: Eugene Ostroukhov <eostroukhov@google.com>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>