A missing flow or an exception while loading a flow can crash the webserver
### Explain the bug

When there is a missing flow or an exception while loading a flow during the call to the trigger endpoint, it can crash the execution queue thread and exit the webserver.

The following log is with the Kafka runner but this is not specific to this runner.

```
2024-01-29 13:10:39,247 ERROR kakfa-queue_1 .c.u.ThreadUncaughtExceptionHandlers Caught an exception in Thread[kakfa-queue_1,5,main]. Shutting down.
java.lang.IllegalStateException: Unable to find flow 'io.exchange.import.job-posting.connector.inbound.neeva' with revision 16 on execution 1y9RSMPXNOWs2IyKHqAWy5
    at io.kestra.core.repositories.FlowRepositoryInterface.findByExecution(FlowRepositoryInterface.java:34)
    at io.kestra.webserver.controllers.ExecutionController.lambda$trigger$9(ExecutionController.java:510)
    at io.kestra.ee.runner.kafka.KafkaQueue.lambda$receive$1(KafkaQueue.java:153)
    at java.base/java.lang.Iterable.forEach(Unknown Source)
    at io.kestra.ee.runner.kafka.KafkaQueue.lambda$receive$2(KafkaQueue.java:152)
    at io.micrometer.core.instrument.internal.TimedRunnable.run(TimedRunnable.java:49)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.base/java.lang.Thread.run(Unknown Source)
2024-01-29 13:10:39,355 WARN  command-shutdown io.kestra.cli.AbstractCommand Receiving shutdown ! Try to graceful exit
```



### Environment Information

- Kestra Version: 0.14
- Operating System and Java Version (if not using Kestra Docker image):

webserver/src/main/java/io/kestra/webserver/controllers/ExecutionController.java
webserver/src/main/java/io/kestra/webserver/controllers/ExecutionController.java
diff --git a/webserver/src/main/java/io/kestra/webserver/controllers/ExecutionController.java b/webserver/src/main/java/io/kestra/webserver/controllers/ExecutionController.java
index 369f557ccc..9c3d8a9303 100644
--- a/webserver/src/main/java/io/kestra/webserver/controllers/ExecutionController.java
+++ b/webserver/src/main/java/io/kestra/webserver/controllers/ExecutionController.java
@@ -526,12 +526,8 @@ public Execution create(
                     }
 
                     Execution item = either.getLeft();
-                    if (item.getId().equals(current.getId())) {
-                        Flow flow = flowRepository.findByExecution(current);
-
-                        if (this.isStopFollow(flow, item)) {
-                            emitter.success(item);
-                        }
+                    if (item.getId().equals(current.getId()) && this.isStopFollow(found, item)) {
+                        emitter.success(item);
                     }
                 });
 
