refactor: move cache patches to the Next Server astgrep based patches

[vicb]

migrating patch caches to use astgrep, adding tests

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This is part 2 of 3 in a stack made with GitButler:

•  3  refactor: convert require.resolve patches to astgrep #707
•  2  refactor: move cache patches to the Next Server astgrep based patches #706 👈
•  1  refactor: group patches for next-server.js #705

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Latest commit: a1c54c6

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commit: a1c54c6

[vicb]

Thanks for the reviews!

Stacked PRs is such a mess with GitButler... unless there is something I miss