Update our Codecov setup

[antonpirker]

This PR:

• Cleans up our pytest configuration and moves everything into pytest.ini
• Make our Codecov setup more valuable.

If there is now a test failing we get this in the PR:

Fixes #3194

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.14%. Comparing base (bcc563c) to head (3678caf).

❗ Current head 3678caf differs from pull request most recent head 2c41899

Please upload reports for the commit 2c41899 to get more accurate results.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3190      +/-   ##
==========================================
+ Coverage   79.12%   79.14%   +0.02%     
==========================================
  Files         131      131              
  Lines       14173    14173              
  Branches     2971     2971              
==========================================
+ Hits        11214    11217       +3     
  Misses       2118     2118              
+ Partials      841      838       -3     

see 3 files with indirect coverage changes

[sentrivana]

💯