feat(docker): Add multi-platform support for Docker build

[gondoi]

No description provided.

[cursor]

PR Summary

Medium Risk
Changes how release images are built and published (external reusable workflow, dual runners); misconfiguration could break CI publishes or produce wrong-arch images.

Overview
Docker publishing for sv-dune no longer uses the in-repo composite action .github/actions/docker-publish (that action is removed). docker_publish.yaml now calls the shared reusable workflow FuelLabs/github-actions/.../docker-build-push.yml@master with build-backend: native and linux/amd64 + linux/arm64 (ARM on ubuntu-24.04-arm).

The previous matrix job that invoked the local action is replaced by a dedicated build-and-publish-sv-dune job and an explicit if for workflow_dispatch package selection. Comments in the workflow explain avoiding matrix + workflow_call + job-level if on matrix.*, and adding one job per package instead.

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