[KYUUBI #1930] Export TRINO_ENGINE_HOME in load-kyuubi-env script

<!--
Thanks for sending a pull request!

Here are some tips for you:
  1. If this is your first time, please read our contributor guidelines: https://kyuubi.readthedocs.io/en/latest/community/contributions.html
  2. If the PR is related to an issue in https://github.com/apache/incubator-kyuubi/issues, add '[KYUUBI #XXXX]' in your PR title, e.g., '[KYUUBI #XXXX] Your PR title ...'.
  3. If the PR is unfinished, add '[WIP]' in your PR title, e.g., '[WIP][KYUUBI #XXXX] Your PR title ...'.
-->

### _Why are the changes needed?_
<!--
Please clarify why the changes are needed. For instance,
  1. If you add a feature, you can talk about the use case of it.
  2. If you fix a bug, you can clarify why it is a bug.
-->

### _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.apache.org/docs/latest/develop_tools/testing.html#running-tests) locally before make a pull request

Closes #1932 from hddong/add-trino-engine-home.

Closes #1930

26ed8ce2 [root] [KYUUBI #1930] Export TRINO_ENGINE_HOME in load-kyuubi-env script

Lead-authored-by: hongdongdong <hongdongdong@cmss.chinamobile.com>
Co-authored-by: root <root@DESKTOP-30EIBMO.localdomain>
Signed-off-by: Cheng Pan <chengpan@apache.org>

bin/load-kyuubi-env.sh

@@ -101,6 +101,7 @@ fi
 
 export FLINK_HOME="${FLINK_HOME:-"${FLINK_BUILTIN}"}"
 export FLINK_ENGINE_HOME="${KYUUBI_HOME}/externals/engines/flink"
+export TRINO_ENGINE_HOME="${KYUUBI_HOME}/externals/engines/trino"
 export SPARK_HOME="${SPARK_HOME:-"${SPARK_BUILTIN}"}"
 
 # Print essential environment variables to console
@@ -120,5 +121,7 @@ if [ $silent -eq 0 ]; then
   echo "SPARK_HOME: ${SPARK_HOME}"
   echo "SPARK_CONF_DIR: ${SPARK_CONF_DIR:-"${SPARK_HOME}/conf"}"
 
+  echo "TRINO_ENGINE_HOME: ${TRINO_ENGINE_HOME}"
+
   echo "HADOOP_CONF_DIR: ${HADOOP_CONF_DIR}"
 fi