branch-3.0: [fix](regression) fix txn insert case #44395 (#44492)

Cherry-picked from #44395

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

Author: github-actions[bot]

regression-test/suites/insert_p0/insert_with_null.groovy

@@ -35,6 +35,11 @@ suite("insert_with_null") {
         );
     """
 
+    sql "ADMIN SET FRONTEND CONFIG ('commit_timeout_second' = '100')"
+    onFinish {
+        sql "ADMIN SET FRONTEND CONFIG ('commit_timeout_second' = '30')"
+    }
+
     def getRowCount = { expectedRowCount ->
         def retry = 0
         while (retry < 30) {

regression-test/suites/insert_p0/transaction/txn_insert.groovy

@@ -42,6 +42,11 @@ suite("txn_insert") {
         return null
     }
 
+    sql "ADMIN SET FRONTEND CONFIG ('commit_timeout_second' = '100')"
+    onFinish {
+        sql "ADMIN SET FRONTEND CONFIG ('commit_timeout_second' = '30')"
+    }
+
     for (def use_nereids_planner : [/*false,*/ true]) {
         sql " SET enable_nereids_planner = $use_nereids_planner; "