Remove syn version 1 (#8678)

#8547


  This updates a few of our crates to remove the older `syn 1` crate.

This updates:
- `criterion` -> `0.8`
- `itertools` -> `0.14`

And also certain `sigp` crates:
- `xdelta3` -> [`fe39066`](fe3906605c)
- `superstruct` -> `0.10.1`
- `ethereum_ssz` -> `0.10.1`
- `tree_hash` -> `0.12.1`
- `metastruct` -> `0.1.4`
- `context_deserialize` -> `0.2.1`
- `compare_fields` -> `0.1.1`


Co-Authored-By: Mac L <mjladson@pm.me>

consensus/types/benches/benches.rs

@@ -1,8 +1,9 @@
-use criterion::{BatchSize, BenchmarkId, Criterion, black_box, criterion_group, criterion_main};
+use criterion::{BatchSize, BenchmarkId, Criterion, criterion_group, criterion_main};
 use fixed_bytes::FixedBytesExtended;
 use milhouse::List;
 use rayon::prelude::*;
 use ssz::Encode;
+use std::hint::black_box;
 use std::sync::Arc;
 use types::{
     BeaconState, Epoch, Eth1Data, EthSpec, Hash256, MainnetEthSpec, Validator,