Docs improvement: Glue Data Catalog

According to https://github.com/onetable-io/onetable/issues/262

Docs needs to clarify
1. DB names appropriately i.e. instead of `onetable_synced_db` call it `onetable_synced_delta_db` (same for hudi and iceberg as well)
2. Command to create the crawler is incorrect. It should instead be like `aws glue create-crawler --name onetable_delta_crawler --role arn:aws:iam::${accountId}:role/service-role/${roleName} --database onetable_synced_delta_db --targets "{\"DeltaTargets\":[{\"DeltaTables\":[\"${s3DataPath}\"],\"WriteManifest\":false,\"CreateNativeDeltaTable\":true}]}"`