iceberg_expire_* session settings

These settings are available in system.settings and are autogenerated from source.

iceberg_expire_default_max_ref_age_ms

Default value for Iceberg table property history.expire.max-ref-age-ms used by expire_snapshots when that property is absent.

Default value for Iceberg table property history.expire.max-snapshot-age-ms used by expire_snapshots when that property is absent.

Default value for Iceberg table property history.expire.min-snapshots-to-keep used by expire_snapshots when that property is absent.