test: Adding an equivalent of netcode-qa test in the same way as present in N4E

[michalChrobot]

This PR adds a test that checks the following conditions:

1. If the PR modifies code and contains tests it will pass
2. If the PR doesn't contain tests, netcode-qa needs to be added as reviewer (approval is not necessary for this test to pass)
3. Otherwise the test will fail

In this way we will have the same workflow in both NGO and N4E packages. This will work mostly as additional "reminder" about including tests whenever possible

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