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/utils/frame/remote-externalities/src/lib.rs

@@ -29,7 +29,6 @@ use jsonrpsee::{
 use log::*;
 use serde::de::DeserializeOwned;
 use sp_core::{
-	hashing::twox_128,
 	hexdisplay::HexDisplay,
 	storage::{
 		well_known_keys::{is_default_child_storage_key, DEFAULT_CHILD_STORAGE_KEY_PREFIX},
@@ -999,10 +998,11 @@ where
 
 		// Then, a few transformation that we want to perform in the online config:
 		let online_config = self.as_online_mut();
-		online_config
-			.pallets
-			.iter()
-			.for_each(|p| online_config.hashed_prefixes.push(twox_128(p.as_bytes()).to_vec()));
+		online_config.pallets.iter().for_each(|p| {
+			online_config
+				.hashed_prefixes
+				.push(sp_crypto_hashing::twox_128(p.as_bytes()).to_vec())
+		});
 
 		if online_config.child_trie {
 			online_config.hashed_prefixes.push(DEFAULT_CHILD_STORAGE_KEY_PREFIX.to_vec());