Fixes #57651, #58637 and #58643

Fixes #57651, #58637 and #58643
* backends/groupwise/e-cal-backend-groupwise-utils.c:
(e_gw_connection_send_appointment) : Append the container id to
the gwrecordid obtained via ITIP to match the representation
in the SOAP interface.
(e_gw_item_set_changes): Updates to 'completed' field in the Task
is not sticky in the server, when using the modifyRequest. Using a
separate completeRequest call to update the same.
* backends/groupwise/e-cal-backend-groupwise-utils.h: removed the
unused default_zone parameter from e_gw_connection_send_appointment.
* backends/groupwise/e-cal-backend-groupwise.c:
(get_deltas): return boolean values not the connection status as the
caller is not expected to handle it anyway.
(sanitize_component): renamed set_container_id function, so it
correctly depicts what it does.
(e_cal_backend_groupwise_create_object): Make a getItemsRequest to the
server to obtain the items while creating recurring events. The original
call returns only the item ids and the client requires the icalids too
to keep the cache valid.
(e_cal_backend_groupwise_modify_object) : Use the completeRequest method
to update task completion.
(receive_object) : The call to e_gw_connection_send_appointment updated
to reflect the change in its signature.
(e_cal_backend_groupwise_receive_objects): set the method on the subcomp
created before passing it over to receive_object.