Update Iceberg version to 1.6.0 #546

Job	Run time
build-images (accumulo, accumulo)	9s
build-images (centos7-oj17, linux/amd64,linux/arm64)	11s
build-images (centos7-oj17-openldap-referrals, linux/amd64,linux/arm64, openldap)	20s
build-images (centos7-oj17-openldap-active-directory, linux/amd64,linux/arm64, openldap-active-di...	12s
build-images (spark3-iceberg, linux/amd64,linux/arm64, spark3-iceberg)	12s
build-images (spark3-delta, linux/amd64,linux/arm64, spark3-delta)	13s
build-images (spark3-hudi, linux/amd64,linux/arm64, spark3-hudi)	11s
build-images (kerberos, linux/amd64,linux/arm64, kerberos)	10s
build-images (hive3.1-hive, linux/amd64,linux/arm64, hive3.1-hive)	16s
build-images (hdp3.1-hive-kerberized, hdp3.1-hive)	45s
build-images (phoenix5, linux/amd64,linux/arm64)	12s
	2m 51s

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