test_reextract_metadata some times times out on NFS

```
dandi@drogon:/mnt/backup/dandi/tinuous-logs/dandi-cli/2024/09$ git grep 'test_reextract_metadata - Failed: Timeout'
09/github/push/master/8e0b1c3/Tests/5813/17_test (ubuntu-latest, 3.8, nfs).txt:2024-09-09T18:34:27.1037493Z FAILED dandi/cli/tests/test_service_scripts.py::test_reextract_metadata - Failed: Timeout >300.0s
09/github/push/master/8e0b1c3/Tests/5813/test (ubuntu-latest, 3.8, nfs)/8_Run all tests.txt:2024-09-09T18:34:27.1037478Z FAILED dandi/cli/tests/test_service_scripts.py::test_reextract_metadata - Failed: Timeout >300.0s
13/github/cron/20240913T060423/9580513/Tests/5823/17_test (ubuntu-latest, 3.8, nfs).txt:2024-09-13T06:25:22.3331933Z FAILED dandi/cli/tests/test_service_scripts.py::test_reextract_metadata - Failed: Timeout >300.0s
13/github/cron/20240913T060423/9580513/Tests/5823/test (ubuntu-latest, 3.8, nfs)/8_Run all tests.txt:2024-09-13T06:25:22.3331928Z FAILED dandi/cli/tests/test_service_scripts.py::test_reextract_metadata - Failed: Timeout >300.0s
13/github/pr/1497/8dba010/Tests/5824/17_test (ubuntu-latest, 3.8, nfs).txt:2024-09-13T14:26:35.3974202Z FAILED dandi/cli/tests/test_service_scripts.py::test_reextract_metadata - Failed: Timeout >300.0s
13/github/pr/1497/8dba010/Tests/5824/test (ubuntu-latest, 3.8, nfs)/8_Run all tests.txt:2024-09-13T14:26:35.3974196Z FAILED dandi/cli/tests/test_service_scripts.py::test_reextract_metadata - Failed: Timeout >300.0s
```

needs checking amount of time it generally takes I guess when it does not time out and seeing if it is really a matter of raising time out (check if we could custom time out higher and only on NFS) or there is more to it. We have test logs on drogon:/mnt/backup/dandi/tinuous-logs/dandi-cli/ to see if reported slow in general etc. @asmacdo could you please look/summarize more on this test timing etc?