fix(iceberg): Make sure iceberg table has been loaded

[Xuanwo]

I hereby agree to the terms of the CLA available at: https://docs.databend.com/dev/policies/cla/

Summary

Make sure iceberg able to load via REST catalog.

This PR fixes an issue that prevents iceberg table been constructed correctly. After this PR, iceberg table is able to read successfully:

I will add full tpch test upon iceberg later.

Tests

• Unit Test
• Logic Test
• Benchmark Test
• No Test - Explain why

Type of change

• Bug Fix (non-breaking change which fixes an issue)
• New Feature (non-breaking change which adds functionality)
• Breaking Change (fix or feature that could cause existing functionality not to work as expected)
• Documentation Update
• Refactoring
• Performance Improvement
• Other (please describe):

---

This change is