Fail MR pipeline if downstream package builds fail

Balasankar 'Balu' Crequested to merge
do-not-allow-package-builds-to-fail into master

Package building and E2E tests are currently run as separate jobs currently. Because of this, we now have the flexibility to ensure that a legit package build failure will cause an MR pipeline to fail, while a flaky QA failure won't cause it. This will ensure dependency changes that will cause broken master pipelines can be caught at the development time itself.

As part of &9034 (closed)

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