Review and fix issues with find

okay, problems that I see:

- [ ] `maxdepth` is not supported
- [ ] `withdirs` is not supported (must have for expand path)
- [ ] doesn't check bucket name `find('.')` and `find('etasderwer')` return the same result
- [ ] it keeps appending ids to cache every time even for already known
- [ ] cache is not locked (multithreading support) - this is a bit more advanced and less critical to start with

_Originally posted by @shcheklein in https://github.com/iterative/PyDrive2/issues/229#issuecomment-1242791704_