tests: remove fixtures, use pytest-servers

[dtrifiro]

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[codecov-commenter]

Codecov Report

Merging #89 (010cdfb) into main (010cdfb) will not change coverage.
The diff coverage is n/a.

❗ Current head 010cdfb differs from pull request most recent head eb476cb. Consider uploading reports for the commit eb476cb to get more accurate results

@@           Coverage Diff           @@
##             main      #89   +/-   ##
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  Coverage   34.32%   34.32%           
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  Files          33       33           
  Lines        1681     1681           
  Branches      302      302           
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  Hits          577      577           
  Misses       1091     1091           
  Partials       13       13           

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[efiop]

@dtrifiro Looks like s3 fixture is still randomly failing. Could you take a look, please?

[dtrifiro]

Seems universal pathlib is broken on 3.11, see fsspec/universal_pathlib#67

[dtrifiro]

Waiting on #98

[efiop]

@dtrifiro Please rebase.

EDIT: ah, nevermind