Add get_sbom_advisories test variant

[dejanb]

Currently get_sbom_advisories is disabled as we try to use it against large sboms and the endpoint is too slow fort automated testing. Until we fix this, we should find some reasonable sbom (like quarkus one) and include it in test runs. This should give us some indication on the performance degradation of the endpoint. Ideally we would be able to run tests against this endpoint with multiple sboms of various sizes.