Missing properties in discovery core-site.xml for Hive impersonation

[maltesander]

Description

When using kerberized HDFS and Hive, for impersonation some properties must be set which are currently e.g. overriden in HDFS as in this Hive test
https://github.com/stackabletech/hive-operator/blob/235a531bf463e91a59578f5edd4602afba8cf8ba/tests/templates/kuttl/kerberos-hdfs/30-install-hdfs.yaml.j2#L32

hadoop.proxyuser.hive.hosts="*"
hadoop.proxyuser.hive.users="*"

This works for HDFS and the role / rolegroup level, but is left out from the "discovery" core-site.xml.

This leads to problems for Hive impersonation which just mounts the core-site.xml.