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/network/bitswap/src/lib.rs

@@ -500,7 +500,7 @@ mod tests {
 								0x70,
 								cid::multihash::Multihash::wrap(
 									u64::from(cid::multihash::Code::Blake2b256),
-									&sp_core::hashing::blake2_256(&ext.encode()[pattern_index..]),
+									&sp_crypto_hashing::blake2_256(&ext.encode()[pattern_index..]),
 								)
 								.unwrap(),
 							)