feat: use cargo-nextest in ci

[baszalmstra]

Use cargo nextest in CI

[codecov[bot]]

Codecov Report

Merging #433 (890968d) into main (9ecf73a) will not change coverage. The diff coverage is n/a.

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##             main     #433   +/-   ##
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  Coverage   83.13%   83.13%           
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  Files         281      281           
  Lines       16648    16648           
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  Hits        13840    13840           
  Misses       2808     2808           

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[baszalmstra]

@Wodann I think the output of nextest is much nicer than regular cargo test for sure but I don't know if the costs outway of "something extra" and non-standardness outway the benefits. If you don't mind I would like to try for a while and revert if we don't feel this adds more than it costs. WDYT?