Network sync refactoring (part 4) (#11412)

* Remove direct dependency of `sc-network` on `sc-network-light`

* Move `WarpSyncProvider` trait and surrounding data structures into `sc-network-common`

* Move `WarpSyncProvider` trait and surrounding data structures into `sc-network-common`

* Create `sync` module in `sc-network-common`, create `ChainSync` trait there (not used yet), move a bunch of associated data structures from `sc-network-sync`

* Switch from concrete implementation to `ChainSync` trait from `sc-network-common`

* Introduce `OpaqueStateRequest`/`OpaqueStateResponse` to remove generics from `StateSync` trait

* Introduce `OpaqueBlockRequest`/`OpaqueBlockResponse`, make `scheme` module of `sc-network-sync` private

* Surface `sc-network-sync` into `sc-service` and make `sc-network` not depend on it anymore

* Remove now unnecessary dependency from `sc-network`

* Replace crate links with just text since dependencies are gone now

* Remove `warp_sync` re-export from `sc-network-common`

* Update copyright in network-related files

* Address review comments about documentation

* Apply review suggestion

* Rename `extra_requests` module to `metrics`

Co-authored-by: Bastian Köcher <info@kchr.de>

substrate/client/network/sync/src/state.rs

@@ -23,6 +23,7 @@ use codec::{Decode, Encode};
 use log::debug;
 use sc_client_api::{CompactProof, ProofProvider};
 use sc_consensus::ImportedState;
+use sc_network_common::sync::StateDownloadProgress;
 use smallvec::SmallVec;
 use sp_core::storage::well_known_keys;
 use sp_runtime::traits::{Block as BlockT, Header, NumberFor};
@@ -42,15 +43,6 @@ pub struct StateSync<B: BlockT, Client> {
 	skip_proof: bool,
 }
 
-/// Reported state download progress.
-#[derive(Clone, Eq, PartialEq, Debug)]
-pub struct StateDownloadProgress {
-	/// Estimated download percentage.
-	pub percentage: u32,
-	/// Total state size in bytes downloaded so far.
-	pub size: u64,
-}
-
 /// Import state chunk result.
 pub enum ImportResult<B: BlockT> {
 	/// State is complete and ready for import.