BlockId removal: refactor: Backend::block_indexed_body (#12609)

* BlockId removal: refactor: Backend::block_indexed_body

It changes the arguments of `Backend::block_indexed_body` method from: `BlockId<Block>` to: `&Block::Hash`

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

* trigger CI job

substrate/primitives/blockchain/src/backend.rs

@@ -238,7 +238,7 @@ pub trait Backend<Block: BlockT>:
 		Ok(self.indexed_transaction(hash)?.is_some())
 	}
 
-	fn block_indexed_body(&self, id: BlockId<Block>) -> Result<Option<Vec<Vec<u8>>>>;
+	fn block_indexed_body(&self, hash: &Block::Hash) -> Result<Option<Vec<Vec<u8>>>>;
 }
 
 /// Blockchain info