[SPARK-52512] Add pi-with-eventlog example

### What changes were proposed in this pull request?

This PR aims to add an event-log enabled `SparkPi` example.

### Why are the changes needed?

To provide a rich example about how to use the event logs and SHS.

### Does this PR introduce _any_ user-facing change?

No behavior change.

### How was this patch tested?

Manually.

```
$ kubectl get sparkapp
NAME                   CURRENT STATE      AGE
pi-with-eventlog       ResourceReleased   3m23s
spark-history-server   RunningHealthy     6m31s
```

![Screenshot 2025-06-17 at 09 17 36](https://github.com/user-attachments/assets/70387571-1d7e-41ce-8643-0b9fb56ba52c)

### Was this patch authored or co-authored using generative AI tooling?

No.

Closes apache#250 from dongjoon-hyun/SPARK-52512.

Authored-by: Dongjoon Hyun <[email protected]>
Signed-off-by: Dongjoon Hyun <[email protected]>

Author: dongjoon-hyun

examples/pi-with-eventlog.yaml

@@ -0,0 +1,39 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+apiVersion: spark.apache.org/v1beta1
+kind: SparkApplication
+metadata:
+  name: pi-with-eventlog
+spec:
+  mainClass: "org.apache.spark.examples.SparkPi"
+  jars: "local:///opt/spark/examples/jars/spark-examples.jar"
+  sparkConf:
+    spark.jars.packages: "org.apache.hadoop:hadoop-aws:3.4.1"
+    spark.jars.ivy: "/tmp/.ivy2.5.2"
+    spark.dynamicAllocation.enabled: "true"
+    spark.dynamicAllocation.shuffleTracking.enabled: "true"
+    spark.dynamicAllocation.maxExecutors: "3"
+    spark.kubernetes.authenticate.driver.serviceAccountName: "spark"
+    spark.kubernetes.container.image: "apache/spark:4.0.0-java21-scala"
+    spark.eventLog.enabled: "true"
+    spark.eventLog.dir: "s3a://spark-events/"
+    spark.hadoop.fs.s3a.endpoint: "http://localstack:4566"
+    spark.hadoop.fs.s3a.path.style.access: "true"
+    spark.hadoop.fs.s3a.access.key: "test"
+    spark.hadoop.fs.s3a.secret.key: "test"
+  applicationTolerations:
+    resourceRetainPolicy: OnFailure
+  runtimeVersions:
+    sparkVersion: "4.0.0"