BlockId removal: refactor: BlockBackend::block|block_status (#13014)

* BlockId removal: refactor: BlockBackend::block|block_status

It changes the arguments of:
-  `BlockBackend::block`
-  `BlockBackend::block_status`

method from: `BlockId<Block>` to: `Block::Hash`

This PR is part of BlockId::Number refactoring analysis (paritytech/substrate#11292)

* non-obvious reworks

* doc fix

* Apply suggestions from code review

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

Co-authored-by: Bastian Köcher <git@kchr.de>
Co-authored-by: parity-processbot <>

substrate/client/cli/src/commands/export_blocks_cmd.rs

@@ -23,7 +23,7 @@ use crate::{
 };
 use clap::Parser;
 use log::info;
-use sc_client_api::{BlockBackend, UsageProvider};
+use sc_client_api::{BlockBackend, HeaderBackend, UsageProvider};
 use sc_service::{chain_ops::export_blocks, config::DatabaseSource};
 use sp_runtime::traits::{Block as BlockT, Header as HeaderT};
 use std::{fmt::Debug, fs, io, path::PathBuf, str::FromStr, sync::Arc};
@@ -73,7 +73,7 @@ impl ExportBlocksCmd {
 	) -> error::Result<()>
 	where
 		B: BlockT,
-		C: BlockBackend<B> + UsageProvider<B> + 'static,
+		C: HeaderBackend<B> + BlockBackend<B> + UsageProvider<B> + 'static,
 		<<B::Header as HeaderT>::Number as FromStr>::Err: Debug,
 	{
 		if let Some(path) = database_config.path() {