Fix Polaris Dockerfile with correct executable jar location #617

Job	Run time
build-images (almalinux9-oj17, linux/amd64,linux/arm64)	3m 30s
build-images (almalinux9-oj17-openldap-referrals, linux/amd64,linux/arm64, openldap)	6m 31s
build-images (almalinux9-oj17-openldap-active-directory, linux/amd64,linux/arm64, openldap-active...	6m 59s
build-images (polaris-catalog, polaris-catalog)	2m 58s
build-images (spark3-iceberg, linux/amd64,linux/arm64, spark3-iceberg)	12m 27s
build-images (spark3-delta, linux/amd64,linux/arm64, spark3-delta)	14m 44s
build-images (spark3-hudi, linux/amd64,linux/arm64, spark3-hudi)	15m 41s
build-images (kerberos, linux/amd64,linux/arm64, kerberos)	7m 11s
build-images (hive3.1-hive, linux/amd64,linux/arm64, hive3.1-hive)	36m 29s
build-images (hdp3.1-hive-kerberized, hdp3.1-hive)	3m 50s
build-images (phoenix5, linux/amd64,linux/arm64)	5m 2s
build-images (unity-catalog, unity-catalog)	3m 7s
	1h 58m 29s

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