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/http_api/Cargo.toml

@@ -20,6 +20,7 @@ eth2 = { workspace = true, features = ["lighthouse"] }
 eth2_keystore = { workspace = true }
 ethereum_serde_utils = { workspace = true }
 filesystem = { workspace = true }
+fixed_bytes = { workspace = true }
 graffiti_file = { workspace = true }
 health_metrics = { workspace = true }
 initialized_validators = { workspace = true }
@@ -41,6 +42,7 @@ tempfile = { workspace = true }
 tokio = { workspace = true }
 tokio-stream = { workspace = true }
 tracing = { workspace = true }
+typenum = { workspace = true }
 types = { workspace = true }
 url = { workspace = true }
 validator_dir = { workspace = true }
@@ -54,3 +56,4 @@ zeroize = { workspace = true }
 futures = { workspace = true }
 itertools = { workspace = true }
 rand = { workspace = true, features = ["small_rng"] }
+ssz_types = { workspace = true }