Destroy method in trips

[thehanielcode]

Updates in Trips controller

Destroy method in trips controller:

• [x] when deleting from the bulk booker
• [x] if deletion comes from bulk booker, if not grouped (destroy), if grouped(nothing happens)

Trips controller 160/ 191

• [x] update trip cost
• [x] update trip count

[thehanielcode]

Testing notes: (@user_testing)

Bulk booker, Grouped Trips page, Bookings page

• [ ] Create bookings
• [ ] Delete booking on bulk booker. (It should delete✅ completely, since it is just a booking)
• [ ] Go to the trips page and group some bookings/trips
• [ ] Go to the bookings page, filter for the specific grouped bookings
• [ ] Delete the bookings (make sure there's groupings for different timeslots). Late cancellations should reflect after cancelling. Early cancellations should reflect after cancelling.

Records that should stay are:

• Bookings that have been grouped
• Bookings that have been grouped and cancelled
• Bookings that have been grouped and completed, etc..
• Bookings that have been scheduled and nothing has happened
• Bookings not grouped and deleted should be deleted

Update trip count, update trip cost

• [ ] Create bookings
• [ ] Group the bookings
• [ ] Assign a driver, then complete the trips
• [ ] For some groups, cancel some bookings and check the trip count.

When trip count is being recorded:

• Trip count should be retrieved even if a vehicle is not assigned to a group.
• Trip count, occupancy and actual occupancy should only be there if a group had a vehicle assigned.
• Each time a group is saved after an interaction the trip count method should run as a group is only saved when it's updated.