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

metadata/src/utils/validation.rs

@@ -11,6 +11,7 @@ use crate::{
 use alloc::vec::Vec;
 use hashbrown::HashMap;
 use outer_enum_hashes::OuterEnumHashes;
+use polkadot_sdk::sp_crypto_hashing;
 use scale_info::{form::PortableForm, Field, PortableRegistry, TypeDef, TypeDefVariant, Variant};
 
 pub mod outer_enum_hashes;