[IMP] crm: display correct team count while creating a stage

Currently, when creating a new stage, even if there are sales team(s)
available, the `team_count` always displays zero, because it is a
computed field but is not dependent on any other field.

This commit improves the behavior by small hack, which makes the
compute method dependent on `team_id` field so that it can be
triggered while creating a record.

taskID-2819559

closes odoo/odoo#88738

Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>

addons/crm/models/crm_stage.py

@@ -45,5 +45,6 @@ class Stage(models.Model):
     # This field for interface only
     team_count = fields.Integer('team_count', compute='_compute_team_count')
 
+    @api.depends('team_id')
     def _compute_team_count(self):
         self.team_count = self.env['crm.team'].search_count([])