Trino SQLs cannot be converted to CoralSqlNode & CoralRelNode representation

[aastha25]

Some valid input trino SQLs like:

1. select * from unnest(array[1, 2, 3])
2. select x from unnest(array[1, 2, 3]) t(x)
3. select * from unnest(array[1, 2, 3]) with ordinality
4. SELECT * from default.struct cross join unnest(struct.b) AS t(b1col, b2col) where table default.struct is defined as - default.struct(a int, b array<struct<b1:string, b2:int>>

cannot be converter to Coral IR representation.