[FIX] stock: duplicate picking on push rules

Usecase:
- 2 warehouses 1 and 2
- Create a route with a rule from inter-warehouse to WH2
- Create a picking type for WH1 for stock to inter-warehouse
- Create a planned transfer with 2 stock.move in the wH1 new picking
type
-* Go back to inventory overview
- Click on process on the picking type WH1 -> inter-warehouse
-* Process the picking created before
- Go to WH2 delivery

You see 2 pickings for each stock.move despite they share the same
data (procurement group, source and dest locations)
If you don't do the steps bewteen *, you only have 1 picking.

It's due to the context of the views that is propagate to the
new picking created by push rules.

opw-2533718

closes odoo/odoo#76438

Signed-off-by: Arnold Moyaux <amoyaux@users.noreply.github.com>