Fix clippy lints for `rustc` 1.87 clippy complains about `BeaconChainError` being too large. I went on a bit of a boxing spree because of this. We may instead want to `Box` some of the `BeaconChainError` variants?
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peerdas-devnet-7
DataColumnSidecarsByRoot
DataColumnsByRootIdentifier
/eth/v2/beacon/pool/attestations
committee_index