Spark: Show owner while describing views w/ extended info

[hsiang-c]

In Apache Spark, the Owner property is shown when we DESCRIBE EXTENDED an Iceberg table, see DescribeTableExec and

  // From sql/catalyst/src/main/scala/org/apache/spark/sql/connector/catalog/CatalogV2Util.scala
  val TABLE_RESERVED_PROPERTIES =
    Seq(TableCatalog.PROP_COMMENT,
      TableCatalog.PROP_COLLATION,
      TableCatalog.PROP_LOCATION,
      TableCatalog.PROP_PROVIDER,
      TableCatalog.PROP_OWNER,
      TableCatalog.PROP_EXTERNAL,
      TableCatalog.PROP_IS_MANAGED_LOCATION,
      TableCatalog.PROP_TABLE_TYPE)

It is helpful to show the owner of Iceberg views as well.

[hsiang-c]

cc @amogh-jahagirdar @nastra Please take a look for me when you have time, thanks!

[singhpk234]

[doubt] Does owner means something in iceberg world ? Also does iceberg spark extensions stores owner property