[FIX] sale_timesheet: fix user permission to set sale order

Create a service product [DEMO] with service tracking
'Create a task in a new project'
Create a sale order SO1 with User 1 with [DEMO] product
Create a sale order SO2 with User 2 with [DEMO] product
SO1 will create a task in a project, edit this task and
assign as parent task the one created by SO2

The action will be blocked by security rules, because user 1 cannnot
see the sale order data of user 2 but the action should be
allowed.

Fixing the error with a sudo call

opw-2243370

closes odoo/odoo#50487

Signed-off-by: Nicolas Martinelli (nim) <nim@odoo.com>