feat: add IcebergCatalog rest support

[liko9]

Added ability to lake loader to support writing to Iceberg tables managed by a rest-based catalog. Tested successfully with the Tabular implementation located at https://github.com/tabular-io/iceberg-rest-image and AWS S3. Should work with GCP and Azure too. Helps advance #22

[snowplowcla]

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[liko9]

Thanks for your pull request. Is this your first contribution to a Snowplow open source project? Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

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I signed. I hope all lawyers are happy. :)

[snowplowcla]

Confirmed! @liko9 has signed the Contributor License Agreement. Thanks so much.

[stanch]

Hi @liko9, thanks for this! To fully support Rest in our product, we will need to make more changes (including private repos) — things like creating new artifacts, updating Terraform, surfacing this in our UI, and so on. We will come back to this PR once everything is in place.

Also note that currently we only support Iceberg on AWS, where Glue catalog is probably the most popular one. On GCP/Azure there previously was not a good choice, but Rest is changing that :) Still, we have a few more things to wrap up before we start working on GCP/Azure support (or non-Glue AWS support).