fix(ci): fix background ddl recovery test (#15861) (#15915)

Co-authored-by: Noel Kwan <[email protected]>

src/meta/src/rpc/ddl_controller.rs

@@ -2060,8 +2060,8 @@ impl DdlController {
     }
 
     pub async fn wait(&self) -> MetaResult<()> {
-        let timeout_secs = 30 * 60;
-        for _ in 0..timeout_secs {
+        let timeout_ms = 30 * 60 * 1000;
+        for _ in 0..timeout_ms {
             match &self.metadata_manager {
                 MetadataManager::V1(mgr) => {
                     if mgr
@@ -2085,10 +2085,10 @@ impl DdlController {
                 }
             }
 
-            sleep(Duration::from_secs(1)).await;
+            sleep(Duration::from_millis(1)).await;
         }
         Err(MetaError::cancelled(format!(
-            "timeout after {timeout_secs}s"
+            "timeout after {timeout_ms}ms"
         )))
     }