fix: adapt frontend event context tests

Signed-off-by: discord9 <discord9@163.com>

src/frontend/src/instance.rs

@@ -1675,7 +1675,9 @@ mod tests {
     use std::time::Duration;
 
     use api::prom_store::remote::label_matcher::Type as PromMatcherType;
-    use api::prom_store::remote::{LabelMatcher, Query as RemoteQuery, ReadRequest};
+    use api::prom_store::remote::{
+        Label, LabelMatcher, Query as RemoteQuery, ReadRequest, ReadResponse, Sample,
+    };
     use api::v1::greptime_request::Request;
     use api::v1::meta::{ProcedureDetailResponse, ReconcileRequest, ReconcileResponse};
     use api::v1::query_request::Query;
@@ -2357,7 +2359,7 @@ mod tests {
     impl ProcedureExecutor for MockProcedureExecutor {
         async fn submit_ddl_task(
             &self,
-            _ctx: &ExecutorContext,
+            _ctx: ExecutorContext,
             request: SubmitDdlTaskRequest,
         ) -> common_meta::error::Result<SubmitDdlTaskResponse> {
             self.submitted.lock().unwrap().push(request.task.clone());