deps: use polkadot-sdk umbrella crate (#1786)

* deps: unify usage of polkadot-sdk crates

* cargo fmt

* fix macro crate

* make tests compile

* fix more nits

* fix doc tests

* fix more nits

* more nits

* core: remove polkadot-sdk/std

* cargo fmt

* remove polkadot-sdk/std by default

* Update metadata/Cargo.toml

* remove more std

* Update Cargo.toml

subxt/src/storage/storage_type.rs

@@ -12,6 +12,7 @@ use crate::{
 use codec::Decode;
 use derive_where::derive_where;
 use futures::StreamExt;
+use polkadot_sdk::sp_crypto_hashing;
 use std::{future::Future, marker::PhantomData};
 use subxt_core::storage::address::{Address, StorageHashers, StorageKey};
 use subxt_core::utils::Yes;