Three inline `run:` blocks moved into `scripts/github/runner/`:
* `images_build_outputs.sh "$distros" "$image_tag"` — replaces the
matrix/image_tag computation in the "Compute matrix JSON" step; emits
both outputs to $GITHUB_OUTPUT in one call.
* `distros_matrix.sh "$distros"` — the matrix-JSON primitive
(`split(" ") | map(select(length>0))`), reused by test-dns.yml's
matrix step. Removes the jq duplicate that lived in both workflows.
* The two pre/post-build `Disk pressure` steps now invoke the already-
existing `disk_pressure_report.sh PRE-BUILD` / `POST-BUILD` instead of
duplicating the df/docker-system-df/buildx-du block inline.
Behaviour unchanged; the workflow runs the same commands via the SPOT
helpers.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
kevinveenbirkenbachandClaude Opus 4.7