Split code cov in 3 tasks

[ii-cruz]

What's in this pull request?

Code coverage runs out of disk.
This PR splits code cov into 3 jobs/tasks instead of 2, it should speed up code cov and reduce the amount of disk space needed per job.

Pull request checklist

• [] All tests pass. The project builds and runs.
• I have resolved any merge conflicts.
• I have resolved all clippy and rustfmt warnings.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.33%. Comparing base (16a99b7) to head (69c305b).
Report is 28 commits behind head on albatross.

Additional details and impacted files

@@              Coverage Diff              @@
##           albatross    #2762      +/-   ##
=============================================
+ Coverage      68.25%   68.33%   +0.08%     
=============================================
  Files            411      410       -1     
  Lines          57077    57117      +40     
=============================================
+ Hits           38957    39030      +73     
+ Misses         18120    18087      -33     

Flag	Coverage Δ
unittests	68.33% <ø> (+0.08%)	⬆️

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