Bug 35473: Handle room reservations plugin conflict

Bug 35473: Handle room reservations plugin conflict

We now look for the existance of the room reservations 'bookings' table
prior to attempting to install the core bookings table and migrate it in
the same way the upstream plugin does before proceeding with installing
the core bookings tables.

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>
(cherry picked from commit af47cc3056658182163c98585f364cec3bbba1b0)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>