REST: Expose response headers in GET requests

[dramaticlly]

Attempt to revive #12194 to expose the response header on GET requests in RESTClient

@nastra @danielcweeks can you help take a look?

[dramaticlly]

I realize this is public class in test package and shared in many tests, want to leverage this to ensure we cover the basic test of response header. Please let me know if there's better place to set response headers before features like idempotent etag is implemented.

[gaborkaszab]

Hey @dramaticlly ,
This PR seems almost identical to #12194 I had except this adds X-Iceberg-Version and X-Iceberg-Version response headers. I still have the ETag and freshness aware loading support on my plate, so I'd prefer to re-open the original PR for the response header support and then I'll resume my work on the rest of the functionality.
Anyway, due to timezones I didn't have much chance to respond to your question on the other PR.

[dramaticlly]

Hey @dramaticlly ,

This PR seems almost identical to #12194 I had except this adds X-Iceberg-Version and X-Iceberg-Version response headers. I still have the ETag and freshness aware loading support on my plate, so I'd prefer to re-open the original PR for the response header support and then I'll resume my work on the rest of the functionality.

Anyway, due to timezones I didn't have much chance to respond to your question on the other PR.

Sure @gaborkaszab, I added you as coauthor in the commit as most of the code is in attempt to revive the work. I think it would be the best if you want to continue the original PR. I can close this one