[IMP] hr_timesheet: unset the task_id when the project changed

Before this commit, when the project of the timesheet changed, the
task_id of the timesheet is not unset and so it could have some
inconsistency.

This commit ensures the task linked to the timesheet has the same
project than the one set on the timesheet, otherwise the task_id is
unset.

part of task-2276015
task-3542388

Part-of: odoo/odoo#137820

addons/hr_timesheet/models/hr_timesheet.py

@@ -104,7 +104,9 @@ class AccountAnalyticLine(models.Model):
 
     @api.depends('project_id')
     def _compute_task_id(self):
-        for line in self.filtered(lambda line: not line.project_id):
+        for line in self:
+            if line.project_id and line.project_id == line.task_id.project_id:
+                continue
             line.task_id = False
 
     @api.onchange('project_id')