Optimize editoast ci

[Castavo]

This PR changes two things:

• Only run tarapulin instead on running tests and then tarapaulin
• Run openapi sync check in a separated job (parallelization for the win)

[codecov]

Codecov Report

Merging #4776 (dd9fef1) into dev (fd05e19) will increase coverage by 0.00%.
Report is 2 commits behind head on dev.
The diff coverage is n/a.

❗ Current head dd9fef1 differs from pull request most recent head bf19500. Consider uploading reports for the commit bf19500 to get more accurate results

@@            Coverage Diff            @@
##                dev    #4776   +/-   ##
=========================================
  Coverage     20.06%   20.06%           
  Complexity     2238     2238           
=========================================
  Files           875      875           
  Lines         89386    89386           
  Branches       2298     2298           
=========================================
+ Hits          17938    17939    +1     
+ Misses        70169    70168    -1     
  Partials       1279     1279           

Flag	Coverage Δ
editoast	64.44% <ø> (+0.02%)	⬆️

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see 1 file with indirect coverage changes