[KYUUBI #5106][Flink] Improve logs for fatal errors

### _Why are the changes needed?_
As titled.

### _How was this patch tested?_
- [ ] Add some test cases that check the changes thoroughly including negative and positive cases if possible

- [ ] Add screenshots for manual tests if appropriate

- [x] [Run test](https://kyuubi.readthedocs.io/en/master/contributing/code/testing.html#running-tests) locally before make a pull request

Closes #5107 from link3280/engine_fatal_log.

Closes #5106

db45392d1 [Paul Lin] [KYUUBI #5106][Flink] Improve logs for fatal errors

Authored-by: Paul Lin <paullin3280@gmail.com>
Signed-off-by: Paul Lin <paullin3280@gmail.com>

externals/kyuubi-flink-sql-engine/src/main/scala/org/apache/kyuubi/engine/flink/FlinkSQLEngine.scala

@@ -109,8 +109,8 @@ object FlinkSQLEngine extends Logging {
       countDownLatch.await()
     } catch {
       case t: Throwable if currentEngine.isDefined =>
+        error("Fatal error occurs, thus stopping the engines", t)
         currentEngine.foreach { engine =>
-          error(t)
           engine.stop()
         }
       case t: Throwable =>