fix(clickhouse): strip virtual catalog from view sources

[mday-io]

Summary

• strip ClickHouse's configured virtual catalog from physical source tables in CREATE VIEW queries
• preserve the caller's query expression and reject unexpected source catalogs

Why

The inherited catalog handling normalized the virtual view target but left synthetic three-part source names in the query. ClickHouse only accepts two-part database.table names, so gateway-managed virtual-layer promotion failed after creating the physical object.

Validation

• make style
• make fast-test
• pytest tests/core/engine_adapter/test_clickhouse.py

Closes #5938

[StuffbyYuki]

Should we use _strip_virtual_catalog() instead of inlining table.set("catalog", None)

[mday-io]

That helper creates a separate table object, so it wouldn’t update the table inside the view query. We also need to catch unexpected catalogs here, which is why this code handles it directly