src: close HandleWraps instead of deleting them in OnGCCollect()

When all strong `BaseObjectPtr`s to a `HandleWrap` are gone, we
should not delete the `HandleWrap` outright, but instead close
it and then delete it only once the libuv close callback has been
called.

Based on the valgrind output from the issue below, this has a
good chance of fixing it.

Fixes: https://github.com/nodejs/node/issues/39036

PR-URL: https://github.com/nodejs/node/pull/39441


Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>