Remove consensus/types re-exports (#8540)

There are certain crates which we re-export within `types` which creates a fragmented DevEx, where there are various ways to import the same crates.

```rust
// consensus/types/src/lib.rs
pub use bls::{
AggregatePublicKey, AggregateSignature, Error as BlsError, Keypair, PUBLIC_KEY_BYTES_LEN,
PublicKey, PublicKeyBytes, SIGNATURE_BYTES_LEN, SecretKey, Signature, SignatureBytes,
get_withdrawal_credentials,
};
pub use context_deserialize::{ContextDeserialize, context_deserialize};
pub use fixed_bytes::FixedBytesExtended;
pub use milhouse::{self, List, Vector};
pub use ssz_types::{BitList, BitVector, FixedVector, VariableList, typenum, typenum::Unsigned};
pub use superstruct::superstruct;
```

This PR removes these re-exports and makes it explicit that these types are imported from a non-`consensus/types` crate.


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

beacon_node/beacon_chain/Cargo.toml

@@ -26,6 +26,7 @@ ethereum_serde_utils = { workspace = true }
 ethereum_ssz = { workspace = true }
 ethereum_ssz_derive = { workspace = true }
 execution_layer = { workspace = true }
+fixed_bytes = { workspace = true }
 fork_choice = { workspace = true }
 futures = { workspace = true }
 genesis = { workspace = true }
@@ -39,6 +40,7 @@ logging = { workspace = true }
 lru = { workspace = true }
 merkle_proof = { workspace = true }
 metrics = { workspace = true }
+milhouse = { workspace = true }
 once_cell = { workspace = true }
 oneshot_broadcast = { path = "../../common/oneshot_broadcast/" }
 operation_pool = { workspace = true }
@@ -65,6 +67,7 @@ tokio-stream = { workspace = true }
 tracing = { workspace = true }
 tree_hash = { workspace = true }
 tree_hash_derive = { workspace = true }
+typenum = { workspace = true }
 types = { workspace = true }
 zstd = { workspace = true }