Fix hanging edge Docker build

[githubsaturn]

Summary

• remove the 32-bit ARM target that hangs under QEMU with Node 20
• use the maintained Docker login, QEMU, and Buildx actions
• add a build timeout and cancel superseded edge builds

Testing

• verified the resulting workflow and build script configuration
• existing native Node 20 prechecks pass

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📥 Commits

Reviewing files that changed from the base of the PR and between 03ae305 and c6aaa76.

📒 Files selected for processing (2)

• .github/scripts/build_and_push_edge.sh
• .github/workflows/build_push_docker_edge.yml

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