Add additional options to codecov-action

[avylove]

I noticed after the last PR that a CodeCov report hadn't been generated. It looks like they haven't worked for a few months. It seems they are now requiring a token where previously it was optional. I also added the option to fail if codecov fails, which used to happen when we used the cli directly, but is disabled by default with the codecov action.

I also tried to update the action to V4, but that failed for 2.7 because the action (both V3 and V4) use a PyInstaller wrapped binary of the codecov-cli and one of the subcommands used in V4 is looking for a slightly newer version of glibc than the docker image for 2.7 provides. codecov/codecov-action#1277

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.31%. Comparing base (75a34ef) to head (950a4b1).
Report is 3 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #272      +/-   ##
==========================================
- Coverage   95.41%   95.31%   -0.10%     
==========================================
  Files           9        9              
  Lines        1025     1025              
  Branches      216      216              
==========================================
- Hits          978      977       -1     
- Misses         43       44       +1     
  Partials        4        4              

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[jquast]

Thanks so much for noticing and repairing it!