Remove hard-coded query number in query parsing for NDS-H

[jihoonson]

-- Template file: 15

create temp view revenue1 (supplier_no, total_revenue) as ...;

select ...;

drop view revenue1;

The query parsing for NDS-H can support a test that runs multiple queries in it like the query 15 as seen above. The parsing currently has the query number 15 hard-coded in it for multi-query support. It skips the parsing otherwise. This hard-coded query number is unnecessary. The parsing also currently assumes that there are always 3 queries after parsing, which can be false. This PR generalizes the parsing logic to fix these problems.

[sayedbilalbari]

Thanks @jihoonson for the improvement. LGTM

[jihoonson]

@sayedbilalbari thanks for the review!