epic: improve test runner

[ClementWalter]

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1. feat: compile test files only once #320
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2. feat: use the rust vm in tests #332
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3. feat: push tests results in the CI as artifacts to be able to pull them locally
4. feat: don't skip but fast return test result
5. feat: catch errors in the pytest_collection_modifyitems to avoid error at the collection level
6. feat: json.load programs progressively #344
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