added changes to enable dev env on aarch64

[kbakanov-dev]

Description

There are some assumptions in our scripts about the underlying host being of an x86_64 architecture. This means that the following commands may fail when executed on aarch64 architecture, e.g. a GB200 machine:

cargo make --cwd pxe build-boot-artifacts-x86-host
cargo make --cwd pxe build-boot-artifacts-bfb

The changes address that problem, however they have not yet been tested for backward compatibility with x86_64 architecture.

Update 29-Apr-2026:

• .skaffold/build: disables RUSTC_WRAPPER/sccache inside the Docker build wrapper. Backward compatible; it may make builds less cache-accelerated, but avoids wrapper issues.
• skaffold.yml: adds forge-unbound-localdev artifact and increases deploy stabilization timeout from 60 to 300.
• dev/deployment/localdev/Dockerfile.dhcp.localdev: ensures Kea hook dir exists and copies libdhcp.so to the exact configured path.
• dev/deployment/localdev/Dockerfile.dhcp.localdev.minikube: same DHCP hook fix for minikube.
• dev/deployment/localdev/Dockerfile.unbound.localdev: local multi-arch Unbound image.
• dev/deployment/localdev/start-unbound.localdev.sh: starts Unbound with local config and control certs.
• dev/deployment/localdev/unbound-exporter.localdev.py: minimal local metrics exporter for Unbound.

Type of Change

• Add - New feature or capability
• Change - Changes in existing functionality
• Fix - Bug fixes
• Remove - Removed features or deprecated functionality
• Internal - Internal changes (refactoring, tests, docs, etc.)

Testing

Manual backward compatibility testing is required

• Unit tests added/updated
• Integration tests added/updated
• Manual testing performed
• No testing required (docs, internal refactor, etc.)

Additional Notes

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