Clippy 1.67 (#3916)

## Proposed Changes

Clippy 1.67.0 put us on blast for the size of some of our errors, most of them written by me ( 👀 ). This PR shrinks the size of `BeaconChainError` by dropping some extraneous info and boxing an inner error which should only occur infrequently anyway.

For the `AttestationSlashInfo` and `BlockSlashInfo` I opted to ignore the lint as they are always used in a `Result<A, Info>` where `A` is a similar size. This means they don't bloat the size of the `Result`, so it's a bit annoying for Clippy to report this as an issue.

I also chose to ignore `clippy::uninlined-format-args` because I think the benefit-to-churn ratio is too low. E.g. sometimes we have long identifiers in `format!` args and IMO the non-inlined form is easier to read:

```rust
// I prefer this...
format!(
    "{} did {} to {}",
    REALLY_LONG_CONSTANT_NAME,
    ANOTHER_REALLY_LONG_CONSTANT_NAME,
    regular_long_identifier_name
);
  
// To this
format!("{REALLY_LONG_CONSTANT_NAME} did {ANOTHER_REALLY_LONG_CONSTANT_NAME} to {regular_long_identifier_name}");
```

I tried generating an automatic diff with `cargo clippy --fix` but it came out at:

```
250 files changed, 1209 insertions(+), 1469 deletions(-)
```

Which seems like a bad idea when we'd have to back-merge it to `capella` and `eip4844` 😱

beacon_node/beacon_chain/src/block_verification.rs

@@ -42,6 +42,11 @@
 //!            END
 //!
 //! ```
+
+// Ignore this lint for `BlockSlashInfo` which is of comparable size to the non-error types it is
+// returned alongside.
+#![allow(clippy::result_large_err)]
+
 use crate::eth1_finalization_cache::Eth1FinalizationData;
 use crate::execution_payload::{
     is_optimistic_candidate_block, validate_execution_payload_for_gossip, validate_merge_block,