Switch to reusable workflows and do some updates

[codecov[bot]]

Codecov Report

:exclamation: No coverage uploaded for pull request base (prīmum@d31a7fc). Click here to learn what that means. The diff coverage is n/a.

@@            Coverage Diff            @@
##             prīmum     #120   +/-   ##
=========================================
  Coverage          ?   93.07%           
=========================================
  Files             ?       17           
  Lines             ?     2585           
  Branches          ?        0           
=========================================
  Hits              ?     2406           
  Misses            ?      179           
  Partials          ?        0           

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[Nemo157]

bors r+

[bors[bot]]

Build failed:

• success

[Nemo157]

bors retry

[bors[bot]]

Build succeeded:

• success