Agentic lakehouse: catalog integrations as pure configuration

### Task Description

**What needs to be done:**
Connect the charts to AWS Glue or any hosted Hive Metastore through values only — service-account/IRSA support, writer-side Glue sync in the examples, and a worked cluster configuration.

**Why this task is needed:**
Most real deployments already have a catalog; pointing at it should not require custom steps.

### Task Type
Other

### Related Issues
**Parent feature issue:** #19256

Start with the deployment charts and example configurations, then trace how values are passed to the catalog integration. Review the AWS Glue, hosted Hive Metastore, service-account/IRSA, and writer-side sync requirements; done means the charts and examples support these through configuration alone with a worked cluster configuration.

Written by the indexing model from the issue text.