Bug 35353: Add REST API endpoint to retrieve old holds

Bug 35353: Add REST API endpoint to retrieve old holds

Same as checkout but for holds, we need to provide a way to retrieve old
holds for a patron.

Test plan:
Create some holds for a patron, cancel and fulfill some, then use the
REST API endpoint with the new 'old' flag set to 1
  /api/v1/patrons/42/holds?old=1

Signed-off-by: Matt Blenkinsop <matt.blenkinsop@ptfs-europe.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>