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/src/block_verification.rs

@@ -66,6 +66,7 @@ use crate::{
     beacon_chain::{BeaconForkChoice, ForkChoiceError},
     metrics,
 };
+use bls::{PublicKey, PublicKeyBytes};
 use educe::Educe;
 use eth2::types::{BlockGossip, EventKind};
 use execution_layer::PayloadStatus;
@@ -97,7 +98,7 @@ use tracing::{Instrument, Span, debug, debug_span, error, info_span, instrument}
 use types::{
     BeaconBlockRef, BeaconState, BeaconStateError, BlobsList, ChainSpec, DataColumnSidecarList,
     Epoch, EthSpec, ExecutionBlockHash, FullPayload, Hash256, InconsistentFork, KzgProofs,
-    PublicKey, PublicKeyBytes, RelativeEpoch, SignedBeaconBlock, SignedBeaconBlockHeader, Slot,
+    RelativeEpoch, SignedBeaconBlock, SignedBeaconBlockHeader, Slot,
     data_column_sidecar::DataColumnSidecarError,
 };