Bug 34634: Show expirationdate of expired holds on reserve/request.pl

Bug 34634: Show expirationdate of expired holds on reserve/request.pl

To test:
1. Place some holds and go to /reserve/request.pl for that bib.
2. If the reserves.expirationdate is set to today or some date in the past the date does not display in the Flatpickr instance.
3. Change the reserves.expirationdate to sometime in the future, the date displays.
4. Aply patch, restart_all
5. Try steps 2-3 again.
6. This time if the expiration date is in the past you should see it displayed. However it will be uneditable.
7. Make sure holds with a expiration date in the future can still be properly edited.

Signed-off-by: Matt Blenkinsop <matt.blenkinsop@ptfs-europe.com>
Signed-off-by: Christine <chlee@pascolibraries.org>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit 0710ccb606faba126acb7b7e62b2868b6a28cbb5)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>