ci: add codecov

[dbudziwojskiNR]

Description

Type of change

• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• New feature / enhancement (non-breaking change which adds functionality)
• Security fix
• Bug fix (non-breaking change which fixes an issue)

Checklist:

• Add changelog entry following the contributing guide
• Documentation has been updated
• This change requires changes in testing:
  • unit tests
  • E2E tests

[codecov]

Welcome to Codecov 🎉

Once merged to your default branch, Codecov will compare your coverage reports and display the results in this comment.

Thanks for integrating Codecov - We've got you covered ☂️