Make the "5 NOT FOUND" / "Exception occurred in retry method that was not classified as transient" error message specific and useful

I'm raising this specific issue because this "5 NOT FOUND" error is uncharacteristically (for a Google API) unhelpful, confusing and cryptic.

When it comes from using Firestore, it can mean that,
* [the collection/document/subcollection//... path sequence wasn't respected](https://stackoverflow.com/questions/75251053/firestore-exception-occurred-in-retry-method-that-was-not-classified-as-transien)
* [Firestore was not properly set up from the console](https://github.com/firebase/firebase-admin-node/issues/2563#issuecomment-2123199809)
* [the `(default)` database was deleted](https://github.com/firebase/firebase-admin-node/issues/2563#issuecomment-2227108636)
* [the custom database ID wasn't specified](https://github.com/firebase/firebase-admin-node/issues/2563#issuecomment-2228809974)
* [a cloud function was idle for a long time](https://github.com/firebase/firebase-functions/issues/536#issuecomment-514938881)

Also, its `note` field in my case was set to "Exception occurred in retry method that was not classified as transient", but the `FirebaseFirestoreError` type doesn't include a `.note` field. (`import { FirebaseFirestoreError } from 'firebase-admin/firestore';`). There was also an empty `details` field that was not defined in `FirebaseFirestoreError`.

@dconeybe any chance for this error message to received some TLC?