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/client/consensus/babe/src/authorship.rs

@@ -27,7 +27,6 @@ use sp_consensus_babe::{
 	make_vrf_sign_data, AuthorityId, BabeAuthorityWeight, Randomness, Slot,
 };
 use sp_core::{
-	blake2_256,
 	crypto::{ByteArray, Wraps},
 	U256,
 };
@@ -109,7 +108,7 @@ pub(super) fn secondary_slot_author(
 		return None
 	}
 
-	let rand = U256::from((randomness, slot).using_encoded(blake2_256));
+	let rand = U256::from((randomness, slot).using_encoded(sp_crypto_hashing::blake2_256));
 
 	let authorities_len = U256::from(authorities.len());
 	let idx = rand % authorities_len;