`build-ci v3`: Update Infra For `spack v1`#654

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infra-update-v3

Commits on Nov 17, 2025

infra: Update to v3, revert changes from temp v2 fix
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Commits on Dec 9, 2025

Use run-self-hosted:false for ci.yml, update args
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Commits on Dec 10, 2025

Commits on Jan 4, 2026

Specify python version for intel manifests
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