Bug 32610: Add date extended patron attribute handling to overdues report

Bug 32610: Add date extended patron attribute handling to overdues report

This makes sure that the overdues report manages filters for
extended patron attributes of the type date correctly.

To test:
* Make sure you have at least one PA marked as 'searchable'
* Make sure your patron has at east one checked out item
* Go to circulation > overdues
* If you have no overdue items, check "Show any items currently checked out:"
* Verify the list of checkouts displays
* Verify the PA filter option displays with the calendar widget
* Limit to the date in your patron's record - list remains
* Limit to any other date - list empties

Signed-off-by: Philip Orr <philip.orr@lmscloud.de>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>