Sync e2e tests (madara-alliance#221)

Co-authored-by: antiyro <[email protected]>

crates/client/sync/src/lib.rs

@@ -62,7 +62,7 @@ pub async fn sync(
         starting_block,
         fetch_config.chain_id.clone(),
         telemetry,
-    )?;
+    ).await?;
 
     Ok(())
 }