Move cryptographic hashing procedures to crypto folder. (#2306)

Step towards https://github.com/paritytech/polkadot-sdk/issues/1975

As reported
https://github.com/paritytech/polkadot-sdk/issues/1975#issuecomment-1774534225
I'd like to encapsulate crypto related stuff in a dedicated folder.

Currently all cryptographic primitive wrappers are all sparsed in
`substrate/core` which contains "misc core" stuff.

To simplify the process, as the first step with this PR I propose to
move the cryptographic hashing there.

The `substrate/crypto` folder was already created to contains `ec-utils`
crate.

Notes:
- rename `sp-core-hashing` to `sp-crypto-hashing`
- rename `sp-core-hashing-proc-macro` to `sp-crypto-hashing-proc-macro`
- As the crates name is changed I took the freedom to restart fresh from
version 0.1.0 for both crates

---------

Co-authored-by: Robert Hambrock <roberthambrock@gmail.com>

substrate/primitives/consensus/beefy/src/test_utils.rs

@@ -19,7 +19,7 @@
 
 use crate::{ecdsa_crypto, Commitment, EquivocationProof, Payload, ValidatorSetId, VoteMessage};
 use codec::Encode;
-use sp_core::{ecdsa, keccak_256, Pair};
+use sp_core::{ecdsa, Pair};
 use std::collections::HashMap;
 use strum::IntoEnumIterator;
 
@@ -41,7 +41,7 @@ impl Keyring {
 	/// Sign `msg`.
 	pub fn sign(self, msg: &[u8]) -> ecdsa_crypto::Signature {
 		// todo: use custom signature hashing type
-		let msg = keccak_256(msg);
+		let msg = sp_crypto_hashing::keccak_256(msg);
 		ecdsa::Pair::from(self).sign_prehashed(&msg).into()
 	}