[bug#53500] Add 42 rust packages, and update 4 of them

[Attila Lendvai]

this is part of my struggle to package openethereum.

this patch series is a rebase of https://issues.guix.gnu.org/53401 which has unfortunately developed countless merge conflicts.

this one supersedes 53401, which i have closed for good.

please apply at your earliest convenience, before this one also develops merge conflicts.

- attila

rust-packages.patch
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