Adding entrypoint file (#37225)

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Adding entrypoint file for spark-2.13
<!--

spark-3.5-scala-2.13.yaml

@@ -1,15 +1,14 @@
 package:
   name: spark-3.5-scala-2.13
   version: 3.5.3
-  epoch: 1
+  epoch: 2
   description: Unified engine for large-scale data analytics
   copyright:
     - license: Apache-2.0
   dependencies:
     runtime:
       - bash
       - busybox
-      - openjdk-17-default-jvm
       - posix-libc-utils
       - procps
       - tini
@@ -63,6 +62,7 @@ pipeline:
       mkdir -p ${{targets.contextdir}}/usr/lib/spark/
       ./dev/make-distribution.sh --name pyspark-2.13 --pip --tgz -Pscala-2.13 -Phive -Phive-thriftserver -Pyarn
       mv dist/* ${{targets.contextdir}}/usr/lib/spark/
+      cp resource-managers/kubernetes/docker/src/main/dockerfiles/spark/entrypoint.sh ${{targets.contextdir}}/usr/lib/spark/
 
 subpackages:
   - name: pyspark-scala-2.13