CI: rerun failed tests in a 2nd pytest run rather than immediately

[bsipocz]

Changing the approach of when to rerun tests, IMO doing them at the end is a better approach to filter out flaky service responses.

This should close #3050

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.54%. Comparing base (7d96ebd) to head (04c6069).
Report is 11 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3152   +/-   ##
=======================================
  Coverage   67.54%   67.54%           
=======================================
  Files         233      233           
  Lines       18493    18493           
=======================================
  Hits        12491    12491           
  Misses       6002     6002           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.