[KYUUBI #5227] [DOCS] Added deploy mode info

### _Why are the changes needed?_

<img width="1080" alt="image" src="https://github.com/apache/kyuubi/assets/3898450/cc118574-c752-449a-9b20-04d2cc59b118">

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

- [x] Add screenshots for manual tests if appropriate

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

### _Was this patch authored or co-authored using generative AI tooling?_
No

Closes #5227 from hanna-liashchuk/patch-2.

Closes #5227

baf391b [Hanna Liashchuk]  fix DOC style
e46dfdd [Cheng Pan] Update docs/deployment/engine_on_kubernetes.md
0746a35 [hanna-liashchuk] upd
233bba0 [hanna-liashchuk] Added deploy mode info

Lead-authored-by: Hanna Liashchuk <[email protected]>
Co-authored-by: hanna-liashchuk <[email protected]>
Co-authored-by: Cheng Pan <[email protected]>
Signed-off-by: Cheng Pan <[email protected]>

docs/deployment/engine_on_kubernetes.md

@@ -36,6 +36,17 @@ Spark on Kubernetes config master by using a special format.
 
 You can use cmd `kubectl cluster-info` to get api-server host and port.
 
+### Deploy Mode
+
+One of the main advantages of the Kyuubi server compared to other interactive Spark clients is that it supports cluster deploy mode.
+It is highly recommended to run Spark in k8s in cluster mode.
+
+The minimum required configurations are:
+
+* spark.submit.deployMode (cluster)
+* spark.kubernetes.file.upload.path (path on s3 or hdfs)
+* spark.kubernetes.authenticate.driver.serviceAccountName ([viz ServiceAccount](#serviceaccount))
+
 ### Docker Image
 
 Spark ships a `./bin/docker-image-tool.sh` script to build and publish the Docker images for running Spark applications on Kubernetes.