Update codecov to version 4

[nikolay-vasilev-prime]

Overview

Update codeconv to the new version

Checklist

Implementation

• [ ] Implementation matches ticket acceptance criteria and technical notes
• [ ] Manually tested against Acceptance Criteria
• [ ] UI checked in Light / Dark mode

Stability

• [ ] Checked if changes affect any features and verified affected features work as expected
• [ ] Added unit tests for new code and verified existing tests work as expected

Code quality

• [ ] Updated CHANGELOG.md, README.md and package versions in pubspec.yaml
• [ ] Dependencies are updated to latest versions or new tickets are created if there are breaking changes or deprecations
• [ ] If an unrelated part of the codebase needs to be updated or refactored, create tickets with proposed changes

[nikolay-vasilev-prime]

@DDavidPrime @StanevPrime I don't have access https://github.com/codecov/codecov-action/issues/1248#issuecomment-1924780848 but the new version of codecov requires it's access token to be added in the repository's secrets. Should I have access or you should add it?

[codecov[bot]]

Codecov Report

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

Project coverage is 100.00%. Comparing base (d1a84eb) to head (44012e6). Report is 4 commits behind head on develop.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #750 +/- ## ============================================= + Coverage 85.81% 100.00% +14.18% ============================================= Files 117 1 -116 Lines 2531 14 -2517 ============================================= - Hits 2172 14 -2158 + Misses 359 0 -359 ```

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