WIP: ci: add IBM-hosted ppc64le and s390x runners #2406
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They're only available in
mesonbuild/wrapdb, not in forks. As a result the emulated ppc64le job is potentially still useful, but it would likely bitrot since it wouldn't run in the main repo. Drop that job.Self-hosted runners don't count toward the concurrent job limit so this actually improves our parallelism.
In forks, the new jobs would sit indefinitely waiting for a runner to pick them up, blocking the workflow from completing. We want to skip those jobs, but the job's
if:directive can't read thematrixcontext. Instead, preprocess the matrix from the prelude job.