Bug 21622: Adjust incorrect GROUP BY clauses in acqui script

Bug 21622: Adjust incorrect GROUP BY clauses in acqui script

acqui/ordered.pl:    GROUP BY aqorders.ordernumber
acqui/spent.pl:    GROUP BY aqorders.ordernumbe

'koha_kohadev.aqorders.biblionumber' isn't in GROUP BY

Test plan:
- Create orders for different basket and using different funds
- Receive some of them
- Hit the ordered and spent pages (from the acqui home page)
=> The tables must contain the same data with and without this patch

Signed-off-by: Jasmine Amohia <jasmineamohia.student@wegc.school.nz>

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>

Signed-off-by: Nick Clemens <nick@bywatersolutions.com>