Mixed Debian/eLxr testing environment may invalidates test results

Issue 1 - Should use eLxr as Base Container ? : The pipeline uses registry.gitlab.com/elxr/ci/pipeline/base:bookworm which is a Debian bookworm base image, not a native eLxr OS container, but using a debain base container affect test results less than the issue 2

Issue 2 - Mixed Repository Sources: The container defaults to using Debian repositories as primary sources while only using eLxr repositories for some dependencies. These issues affect piuparts and other test suites, causing validation against a hybrid Debian/eLxr environment instead of pure eLxr OS. Reference: https://gitlab.com/elxr/tools/tiler/-/jobs/10801027705#L140

reference link in the elxr forum https://forums.elxr.org/t/mixed-debian-elxr-testing-environment-may-invalidates-test-results/61/1