https://github.com/odoo/odoo/pull/114827 added a new attribute in the calendar
view that allowed passing a form view id that is used in the calendar module to
show a different form view when trying to quick create an event. This new
attribute, however, was only used in the calendar module. With this in mind, it
made sense to allow using this attribute in other modules. This commit
implements this, however, the approach used was different. It was decided to
merge quick_create_form_view_id with quick_add as both are related to the
same feature: quick creation of a record in the calendar view. Now, quick_add
receives either a boolean (original behavior) or a number representing the form
view id to be shown when quick creating a record.
task-3286969
closesodoo/odoo#122923
Related: odoo/documentation#4707
Signed-off-by: Arnaud Joset (arj) <arj@odoo.com>