Change runners to reserved runner instance

[philkra]

Move off GitHub hosted runners to dedicated instance.

Disable-check: force-changelog-file
Disable-check: approval-count

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.89%. Comparing base (59f50f2) to head (57cc2aa).
Report is 842 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7866      +/-   ##
==========================================
+ Coverage   80.06%   81.89%   +1.82%     
==========================================
  Files         190      249      +59     
  Lines       37181    45994    +8813     
  Branches     9450    11517    +2067     
==========================================
+ Hits        29770    37668    +7898     
- Misses       2997     3784     +787     
- Partials     4414     4542     +128     

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