Enable DDS unit test retries in LibCI #13677
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As we start running DDS tests on our nightly CI, we encountered some instable tests that fail occasionally - due to Python test thread timing issues. Adding retries on our CI machines, not only GHA.
To solve the client-server timing issues we need to develop a more robust interthread communication mechanism. Currently it's based on CLI prompts. Logging from other threads can interfere with the prompts.