[KYUUBI #4038] [K8S][LOG]Improve print diagnostics info in kubernetes cluster deploy-mode case

### _Why are the changes needed?_

For Spark On Kubernetes Cluster Deploy-Mode, spark will set `spark.submit.deployMode=client` and `spark.kubernetes.submitInDriver=true`.

Kyuubi print diagnostics about deploy-mode for spark sql engine should not only dependence on `spark.submit.deployMode`.

### _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

- [ ] [Run test](https://kyuubi.apache.org/docs/latest/develop_tools/testing.html#running-tests) locally before make a pull request

Closes #4038 from zwangsheng/improve/diagnostics_deploy_mode_for_k8s_cluster.

Closes #4038

5149a0be [zwangsheng] Improve Diagnostics Info in Kubernetes Cluster Mode Case

Authored-by: zwangsheng <2213335496@qq.com>
Signed-off-by: Cheng Pan <chengpan@apache.org>

externals/kyuubi-spark-sql-engine/src/main/scala/org/apache/kyuubi/engine/spark/KyuubiSparkUtil.scala

@@ -57,6 +57,13 @@ object KyuubiSparkUtil extends Logging {
   def engineUrl: String = globalSparkContext.getConf.getOption(
     "spark.org.apache.hadoop.yarn.server.webproxy.amfilter.AmIpFilter.param.PROXY_URI_BASES")
     .orElse(globalSparkContext.uiWebUrl).getOrElse("")
+  def deployMode(sc: SparkContext): String = {
+    if (sc.getConf.getBoolean("spark.kubernetes.submitInDriver", false)) {
+      "cluster"
+    } else {
+      sc.deployMode
+    }
+  }
 
   lazy val diagnostics: String = {
     val sc = globalSparkContext
@@ -67,7 +74,7 @@ object KyuubiSparkUtil extends Logging {
        |                 application ID: $engineId
        |                 application web UI: $engineUrl
        |                 master: ${sc.master}
-       |                 deploy mode: ${sc.deployMode}
+       |                 deploy mode: ${deployMode(sc)}
        |                 version: ${sc.version}
        |           Start time: ${LocalDateTime.ofInstant(Instant.ofEpochMilli(sc.startTime), ZoneId.systemDefault)}
        |           User: ${sc.sparkUser}""".stripMargin