Bug 35950: Move AddReturn call into circulation.pl

Bug 35950: Move AddReturn call into circulation.pl

There should be no change in beahavior. Following the test plan from Bug 35840.

To test:
1. APPLY PATCH, restart_all
2. Turn on RecordLocalUseOnReturn
3. Create a Statistical patron.
4. Check an item out to a regular patron.
5. Check the item out to a Statistical patron.
6. This should trigger a return and you will see 2 entries in the statistics table, one for localuse and one for a return.
7. Try checking out an item to the Stats patron that is NOT checked out.
8. You should only see 1 entry, localuse, in the statistics table.

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>