Split common crates out into their own repos (#3890)

Squashed commit of the following:

commit 1ba4f80cc0
Author: Michael Sproul <michael@sigmaprime.io>
Date:   Tue Jan 17 11:43:18 2023 +1100

    Bye 1.0.0 beta, hello 0.5.x

commit a862b234b2
Author: Michael Sproul <michael@sigmaprime.io>
Date:   Tue Jan 17 10:54:46 2023 +1100

    Cargo fmt

commit e29f358a9e
Author: Michael Sproul <michael@sigmaprime.io>
Date:   Mon Jan 16 18:21:42 2023 +1100

    It compiles :O

commit 1ee4514b7d
Author: Michael Sproul <michael@sigmaprime.io>
Date:   Mon Jan 16 17:27:10 2023 +1100

    Ethereum hashing

commit 69bdd1d61f
Author: Michael Sproul <michael@sigmaprime.io>
Date:   Mon Jan 16 17:24:58 2023 +1100

    Tree hash et al

commit 7cae5d99d7
Author: Michael Sproul <michael@sigmaprime.io>
Date:   Mon Jan 16 17:21:03 2023 +1100

    Delete crates!

commit dd9ee38084
Author: Michael Sproul <michael@sigmaprime.io>
Date:   Mon Jan 16 17:19:19 2023 +1100

    Delete overrides

commit 0d54534eb4
Author: Michael Sproul <michael@sigmaprime.io>
Date:   Mon Jan 16 17:19:04 2023 +1100

    Crate renames

crypto/bls/src/generic_aggregate_signature.rs

@@ -4,9 +4,9 @@ use crate::{
     generic_signature::{GenericSignature, TSignature},
     Error, Hash256, INFINITY_SIGNATURE, SIGNATURE_BYTES_LEN,
 };
-use eth2_serde_utils::hex::encode as hex_encode;
 use serde::de::{Deserialize, Deserializer};
 use serde::ser::{Serialize, Serializer};
+use serde_utils::hex::encode as hex_encode;
 use ssz::{Decode, Encode};
 use std::fmt;
 use std::hash::{Hash, Hasher};

crypto/bls/src/generic_public_key.rs

@@ -1,8 +1,8 @@
 use crate::generic_public_key_bytes::GenericPublicKeyBytes;
 use crate::Error;
-use eth2_serde_utils::hex::encode as hex_encode;
 use serde::de::{Deserialize, Deserializer};
 use serde::ser::{Serialize, Serializer};
+use serde_utils::hex::encode as hex_encode;
 use ssz::{Decode, Encode};
 use std::fmt;
 use std::hash::{Hash, Hasher};

crypto/bls/src/generic_public_key_bytes.rs

@@ -2,9 +2,9 @@ use crate::{
     generic_public_key::{GenericPublicKey, TPublicKey},
     Error, PUBLIC_KEY_BYTES_LEN,
 };
-use eth2_serde_utils::hex::encode as hex_encode;
 use serde::de::{Deserialize, Deserializer};
 use serde::ser::{Serialize, Serializer};
+use serde_utils::hex::encode as hex_encode;
 use ssz::{Decode, Encode};
 use std::convert::TryInto;
 use std::fmt;

crypto/bls/src/generic_signature.rs

@@ -2,9 +2,9 @@ use crate::{
     generic_public_key::{GenericPublicKey, TPublicKey},
     Error, Hash256,
 };
-use eth2_serde_utils::hex::encode as hex_encode;
 use serde::de::{Deserialize, Deserializer};
 use serde::ser::{Serialize, Serializer};
+use serde_utils::hex::encode as hex_encode;
 use ssz::{Decode, Encode};
 use std::fmt;
 use std::hash::{Hash, Hasher};

crypto/bls/src/generic_signature_bytes.rs

@@ -3,9 +3,9 @@ use crate::{
     generic_signature::{GenericSignature, TSignature},
     Error, INFINITY_SIGNATURE, SIGNATURE_BYTES_LEN,
 };
-use eth2_serde_utils::hex::encode as hex_encode;
 use serde::de::{Deserialize, Deserializer};
 use serde::ser::{Serialize, Serializer};
+use serde_utils::hex::encode as hex_encode;
 use ssz::{Decode, Encode};
 use std::convert::TryInto;
 use std::fmt;

crypto/bls/src/get_withdrawal_credentials.rs

@@ -1,5 +1,5 @@
 use crate::PublicKey;
-use eth2_hashing::hash;
+use ethereum_hashing::hash;
 use ssz::Encode;
 
 /// Returns the withdrawal credentials for a given public key.