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>

validator_client/validator_services/src/sync.rs

@@ -1,4 +1,5 @@
 use crate::duties_service::{DutiesService, Error, SelectionProofConfig};
+use bls::PublicKeyBytes;
 use eth2::types::SyncCommitteeSelection;
 use futures::future::join_all;
 use futures::stream::{FuturesUnordered, StreamExt};
@@ -8,7 +9,7 @@ use slot_clock::SlotClock;
 use std::collections::{HashMap, HashSet};
 use std::sync::Arc;
 use tracing::{debug, error, info, warn};
-use types::{ChainSpec, EthSpec, PublicKeyBytes, Slot, SyncDuty, SyncSelectionProof, SyncSubnetId};
+use types::{ChainSpec, EthSpec, Slot, SyncDuty, SyncSelectionProof, SyncSubnetId};
 use validator_store::{DoppelgangerStatus, Error as ValidatorStoreError, ValidatorStore};
 
 /// Top-level data-structure containing sync duty information.