[FIX] stock: don't set draft move with 0 quantity

Usecase:
- Create a picking and a move without quantity
- Click or the show detail or save

The picking goes into the state draft while it shouldn't.
It happens because when a quantity done is set, it will
goes to process_increase that will assign the move. With
0 qty, it's not assign and stay in draft (default value)
The picking state is then computed based on the move state.

To fix it, force the state to assign on stock.move in immediate
transfer without quantity.

Part-of: odoo/odoo#122445

addons/stock/models/stock_move.py

@@ -656,6 +656,9 @@ Please change the quantity done or the rounding precision of your unit of measur
         for vals in vals_list:
             if vals.get('quantity_done') and 'lot_ids' in vals:
                 vals.pop('lot_ids')
+            picking_id = self.env['stock.picking'].browse(vals.get('picking_id'))
+            if picking_id and picking_id.immediate_transfer and not vals.get('qty_done'):
+                vals['state'] = 'assigned'
         return super().create(vals_list)
 
     def write(self, vals):

addons/stock/models/stock_picking.py

@@ -770,7 +770,6 @@ class Picking(models.Model):
                 vals['immediate_transfer'] = False
             if self.env['ir.config_parameter'].sudo().get_param('stock.no_default_immediate_tranfer'):
                 vals['immediate_transfer'] = False
-
         pickings = super().create(vals_list)
 
         for picking, scheduled_date in zip(pickings, scheduled_dates):

addons/stock/tests/test_report.py

@@ -1114,6 +1114,8 @@ class TestReports(TestReportsCommon):
         delivery2_form.scheduled_date = datetime.now() + timedelta(days=1)
         delivery2 = delivery2_form.save()
         delivery2.move_ids.quantity_done = delivery1.move_ids.quantity_done
+        # To avoid stealing the 150 unit in stock
+        delivery2.do_unreserve()
         self.assertEqual(delivery2.move_ids.forecast_availability, 100)
 
         # Check for both deliveries and receipts if the highlight (is_matched) corresponds to the correct picking