Core, Hive-metastore: Table owner can be incorrect in HMS

[gaborkaszab]

When HiveCatalog is used for creating a table the table owner property is taken from a system property of the process running Iceberg. However, in some clients (e.g. Apache Impala) it's not the owner of the process who runs the create table operation and as a result not the desired owner gets written to HMS. For instance, in Impala's case the owner of Catalogd (the process that makes the Iceberg API calls) was set as the table owner and not the user who ran the CREATE TABLE statement.

I changed HiveCatalog to accept an owner parameter from the clients. Note, other Catalog implementations aren't affected because the issue is related to HMS only.