[CI] Update github actions for checkout, cache: v2 -> v3 #5268
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Node12 -> Node16, primarily.
See: https://github.blog/changelog/2022-09-22-github-actions-all-actions-will-begin-running-on-node16-instead-of-node12/ .
Appears safe, both have some improvements we may enjoy, such as zstd for Windows cache.