feat(tests): Calculate coverage via codecov for k8s mode

[navin772]

Purpose of PR?:

Fixes #845

Does this PR introduce a breaking change?
No

If the changes in this PR are manually verified, list down the scenarios covered::

Additional information for reviewer? :
Mention if this PR is part of any design or a continuation of previous PRs

Kindly install the codecov app for the KubeArmor repo - https://github.com/apps/codecov/installations/select_target
Ensure that GITHUB_TOKEN for the repo is accessible via CI.

Checklist:

• Bug fix. Fixes CI Test Coverage Calculation #845
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update
• PR Title follows the convention of <type>(<scope>): <subject>
• Commit has unit tests
• Commit has integration tests