Update Coverage badge flow

[oren-zohar]

Update Coverage badge flow using coveralls.io, see an example for my fork here

coveralls.io provides free service for tracking coverage for open source repos:

• coverage badge
• repo coverage graph over time
• setting coverage decline limit for PRs

---

• closes: https://github.com/elastic/security-team/issues/3496

[DaveSys911]

i see the badge is corrected, but as as discussed:

1. Move the unit test back to cloud beat-ci, right now unit tests are running on main branch instead of the pr, effectively removing it as a quality gate for the pr, since u removed the pr checkout.

2. Add an additional workflow to be run post merge "on push to main" to run unit tests and update the badge representing status of coverage on main, and not the pr branch.

It isn't possible to achieve both from one workflow.

[oren-zohar]

1. Move the unit test back to cloud beat-ci, right now unit tests are running on main branch instead of the pr, effectively removing it as a quality gate for the pr, since u removed the pr checkout.

I'm not sure I'm following, I just split the same workflow into two separate ones with the same triggers. There is no reason to keep them together since they are logically separate, share no cache, and the yml is getting too large.

2. Add an additional workflow to be run post merge "on push to main" to run unit tests and update the badge representing status of coverage on main, and not the pr branch.

the readme will always show the badge for main, not for the PR branch. Why do we need post-merge job?

[github-actions]

Cloudbeat CI 🤖

Integration tests status: success
Tests Summary:

=========================== short test summary info ============================
PASSED integration/tests/test_output_to_elasticsearch.py::test_elastic_index_exists[file-system]
PASSED integration/tests/test_output_to_elasticsearch.py::test_elastic_index_exists[process]
PASSED integration/tests/test_output_to_elasticsearch.py::test_elastic_index_exists[kube-api]
PASSED product/tests/test_cloudbeat.py::test_cloudbeat_pod_exist
PASSED product/tests/test_cloudbeat.py::test_cloudbeat_pods_running
======================== 5 passed, 6 warnings in 1.62s =========================

Link to detailed report: https://elastic.github.io/cloudbeat/333

[DaveSys911]

Approved