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

core/src/tx/mod.rs

@@ -65,8 +65,8 @@ use alloc::borrow::{Cow, ToOwned};
 use alloc::vec::Vec;
 use codec::{Compact, Encode};
 use payload::Payload;
+use polkadot_sdk::sp_crypto_hashing::blake2_256;
 use signer::Signer as SignerT;
-use sp_crypto_hashing::blake2_256;
 
 // Expose these here since we expect them in some calls below.
 pub use crate::client::{ClientState, RuntimeVersion};

core/src/tx/signer.rs

@@ -35,8 +35,8 @@ cfg_substrate_compat! {
 mod pair_signer {
     use super::Signer;
     use crate::Config;
-    use sp_core::Pair as PairT;
-    use sp_runtime::{
+    use polkadot_sdk::sp_core::Pair as PairT;
+    use polkadot_sdk::sp_runtime::{
         traits::{IdentifyAccount, Verify},
         AccountId32 as SpAccountId32, MultiSignature as SpMultiSignature,
     };