Function duckdb_get_timestamp_tz 

pub unsafe extern "C" fn duckdb_get_timestamp_tz(
    val: duckdb_value,
) -> duckdb_timestamp

Returns the TIMESTAMP_TZ value of the given value.

@param val A duckdb_value containing a TIMESTAMP_TZ @return A duckdb_timestamp, or MinValue<timestamp_tz> if the value cannot be converted