workflows: build and push ignition-validate
container from GH Actions
#1336
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Quay builds are amd64-only and haven't been especially reliable. Use GitHub Actions to build both amd64 and arm64 containers for the main branch and for tags, and push them to Quay. Continue building but not pushing containers on PR. Requires the
QUAY_AUTH
repo secret to be set to a Docker credential.Ideally we would cross-build the arm64 container by having the Dockerfile specify
FROM --platform=$BUILDPLATFORM
for the builder container and setGOARCH=$TARGETARCH
. However, Buildah < 1.24.1 doesn't support--platform
in FROM. Build in emulation for now, and skip arm64 in PRs to speed up CI.Fixes #1321.