src: wrap HostPort in ExclusiveAccess

I found it exceedingly hard to figure out if there is a race condition
where one thread reads the inspector agent's HostPort's properties while
another modifies them concurrently.

I think the answer is "no, there isn't" but with this commit use sites
are forced to unwrap the object (and acquire the mutex in the process),
making it a great deal easier to reason about correctness.

PR-URL: https://github.com/nodejs/node/pull/31717


Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: David Carlier <devnexen@gmail.com>