[FEATURE REQUEST] support for returning client region in the loadTable response for S3

[munendrasn]

Is your feature request related to a problem? Please describe.

AWS s3 by default fails when making cross region calls. Latest version of AWS s3 sdk support crossRegionAccess but Iceberg doesn't yet support this functionality.
Any cross region calls are failing

Describe the solution you'd like

It would be great to specify the client.region as part of loadTableResponse in config block along with Credentials. This is property defined by RESTCatalog openAPI spec

Describe alternatives you've considered

Using the crossRegionAccess property. Maybe once Iceberg add support, it would be great to add this property to the spec too

Additional context

No response

[munendrasn]

FYI @dennishuo