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 codecov/codecov-action#1248 (comment) 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]

Codecov Report

All modified and coverable lines are covered by tests ✅

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

Additional details and impacted files

@@              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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