Improves on _attendance_intervals_batch to profit more from batching.
Resources are grouped by timezone since we know they will all have the
same result except for when there are resource assigned attendances.
Those have to be handled separately but are incoroporated in the same
routine.
TaskId-2674527
closesodoo/odoo#78741
Signed-off-by: Yannick Tivisse (yti) <yti@odoo.com>
- Preserved explicit 3rd-party copyright notices
- Explicit boilerplate should not be necessary - copyright law applies
automatically in all countries thanks to Berne Convention + WTO rules,
and a reference to the applicable license is clear enough.
William Braeckman