Configure codecov ignored files

[ahasikos]

Description

This PR introduces the codecov.yml file in which we can include the files we want to ignore from code coverage.

Fixes 194

Type of change

Please delete options that are not relevant.

• [x] New feature (non-breaking change which adds functionality)

How Has This Been Tested?

Codecov now considers the codecov.yml file which includes a list of files to be ignored.

Test Configuration: N/A

Checklist:

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [x] I have added tests that prove my fix is effective or that my feature works
• [x] New and existing unit tests pass locally with my changes
• [x] New and existing E2E tests pass locally with my changes
• [x] Any dependent changes have been merged and published in downstream modules
• [x] I have not added any vulnerable dependencies to my code

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 62.54%. Comparing base (aedfc6b) to head (ec88ecf). Report is 12 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #745 +/- ## ========================================== + Coverage 61.77% 62.54% +0.76% ========================================== Files 195 198 +3 Lines 18246 18071 -175 ========================================== + Hits 11271 11302 +31 + Misses 5876 5684 -192 + Partials 1099 1085 -14 ```

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