Workflow cleanup

[jdegenstein]

coverage.yml was not set up the same way as other workflows, this PR fixes that and deletes the now unnecessary requirements.txt file by moving the pytest-cov installation elsewhere.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.09%. Comparing base (dba9831) to head (fd5515d).
Report is 15 commits behind head on dev.

Additional details and impacted files

@@           Coverage Diff           @@
##              dev     #821   +/-   ##
=======================================
  Coverage   96.08%   96.09%           
=======================================
  Files          25       24    -1     
  Lines        8499     8493    -6     
=======================================
- Hits         8166     8161    -5     
+ Misses        333      332    -1     

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

[jdegenstein]

In the process of fixing one issue, I discovered that .github/actions/setup/action.yml was not setup correctly to accept the input python version. I also fixed that issue and now everything is working as expected.