feat: Track code coverage

[mehabhalodiya]

What type of PR is this?
/kind enhancement

What does this PR do / why do we need it:
Action: https://github.com/marketplace/actions/codecov

A necessity w.r.t project status; Use codecov for generating coverage reports on every new PR.

Have you updated the necessary documentation?

• Documentation update is required by this PR.
• Documentation has been updated.

Which issue(s) this PR fixes:

Fixes https://issues.redhat.com/browse/GITOPS-3278

Test acceptance criteria:

• Unit Test
• E2E Test

How to test changes / Special notes to the reviewer:
You will be able to see the CI checks/Actions running and a comment on the PR made by codecov bot.

[openshift-ci]

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[openshift-ci]

@mehabhalodiya: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/v4.12-kuttl-sequential	6cfe2c6	link	true	/test v4.12-kuttl-sequential
ci/prow/v4.14-kuttl-parallel	6cfe2c6	link	true	/test v4.14-kuttl-parallel

Full PR test history. Your PR dashboard.

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