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/beacon_node_fallback/Cargo.toml

@@ -9,6 +9,7 @@ name = "beacon_node_fallback"
 path = "src/lib.rs"
 
 [dependencies]
+bls = { workspace = true }
 clap = { workspace = true }
 eth2 = { workspace = true }
 futures = { workspace = true }

validator_client/beacon_node_fallback/src/lib.rs

@@ -773,12 +773,13 @@ impl ApiTopic {
 mod tests {
     use super::*;
     use crate::beacon_node_health::BeaconNodeHealthTier;
+    use bls::Signature;
     use eth2::SensitiveUrl;
     use eth2::Timeouts;
     use slot_clock::TestingSlotClock;
     use strum::VariantNames;
     use types::{BeaconBlockDeneb, MainnetEthSpec, Slot};
-    use types::{EmptyBlock, Signature, SignedBeaconBlockDeneb, SignedBlindedBeaconBlock};
+    use types::{EmptyBlock, SignedBeaconBlockDeneb, SignedBlindedBeaconBlock};
     use validator_test_rig::mock_beacon_node::MockBeaconNode;
 
     type E = MainnetEthSpec;