Bug 32256: (follow-up) Use correct patron category

Bug 32256: (follow-up) Use correct patron category

This patch ensures we check the categorycode of the patron trying to issue the items is valid (based on BatchCheckoutsValidCategories), rather than the categorycode of the AutoSelfCheckAllowed patron.

To test:

1 - Enable BatchCheckouts, select nothing in BatchCheckoutsValidCategories
2 - confirm AutoSelfCheckAllowed is allowed and contains the username and password for the self_check user. Confirm self_check user is in category Staff
3 - log into SCO with a user in category Patron, confirm you can only check out 1 item at a time
4 - select Patron in BatchCheckoutsValidCategories
5 - log into SCO with your Patron user again, confirm you can check out multiple items at a time

Sponsored-by: Koha-US
Signed-off-by: Andrew Fuerste Henry <andrewfh@dubcolib.org>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Andrew Fuerste Henry <andrewfh@dubcolib.org>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>