[FIX] stock: speed up lot creation

Creating lots of production lot can take a huge amount of time if the
mail message follower is added on each chatter.

This commit removes this functionality to speed up the creation as
there is no real need to have the lot creator as follower of it.

closes odoo/odoo#78401

Signed-off-by: Rémy Voet <ryv-odoo@users.noreply.github.com>
Signed-off-by: William Henrotin <Whenrow@users.noreply.github.com>

addons/stock/models/stock_production_lot.py

@@ -77,7 +77,7 @@ class ProductionLot(models.Model):
     @api.model_create_multi
     def create(self, vals_list):
         self._check_create()
-        return super(ProductionLot, self).create(vals_list)
+        return super(ProductionLot, self.with_context(mail_create_nosubscribe=True)).create(vals_list)
 
     def write(self, vals):
         if 'company_id' in vals: