Add manual job for debug build/test
For regular non-brew pipelines, we're not building debug kernels as they take a long time, are huge and people usually ignore the debug call traces anyways. However, there are some cases where the debug kernels are useful, e.g. for debugging customer problems. Once we move to GitLab developers can use WIP merge requests to trigger builds instead of waiting on brew, and we need to give them the ability to do a debug build if needed.
AC: Add manual build and test jobs for debug kernels (x86-only). Gotta find a correct setup so the pipeline is not marked as blocked if this branch didn't run but at the same time, publish/setup stages in between complete only after the build job ran.
JIRA ticket created by @veruu