src: allow unique_ptrs with custom deleter in memory tracker

Originally landed in the QUIC repo

Original review metadata:

```
  PR-URL: https://github.com/nodejs/quic/pull/145


Reviewed-By: James M Snell <jasnell@gmail.com>
```

PR-URL: https://github.com/nodejs/node/pull/31870


Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: David Carlier <devnexen@gmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Denys Otrishko <shishugi@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>