workaround to try to stabilise fdb_test_remote_api on github runners

[danovaro]

Description

Contributor Declaration

By opening this pull request, I affirm the following:

• All authors agree to the Contributor License Agreement.
• The code follows the project's coding standards.
• I have performed self-review and added comments where needed.
• I have added or updated tests to verify that my changes are effective and functional.
• I have run all existing tests and confirmed they pass.

🌈🌦️📖🚧 Documentation Z3FDB 🚧📖🌦️🌈
https://sites.ecmwf.int/docs/dev-section/z3fdb/pull-requests/PR-235

🌈🌦️📖🚧 Documentation FDB 🚧📖🌦️🌈
https://sites.ecmwf.int/docs/dev-section/fdb/pull-requests/PR-235

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 74.03%. Comparing base (ed9fc01) to head (2c22635).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #235   +/-   ##
========================================
  Coverage    74.03%   74.03%           
========================================
  Files          376      376           
  Lines        23738    23738           
  Branches      2471     2471           
========================================
  Hits         17574    17574           
  Misses        6164     6164           

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