[FIX] pos_adyen: Adyen for Platforms fixes

- The Adyen sync cron didn't call the function to sync terminals

- Do not specify the merchantAccount when creating a store, the proxy
will add it itself.

closes odoo/odoo#59819

Signed-off-by: pimodoo <pimodoo@users.noreply.github.com>

addons/pos_adyen/models/adyen_account.py

@@ -14,6 +14,11 @@ class AdyenAccount(models.Model):
     store_ids = fields.One2many('adyen.store', 'adyen_account_id')
     terminal_ids = fields.One2many('adyen.terminal', 'adyen_account_id')
 
+    @api.model
+    def _sync_adyen_cron(self):
+        self.env['adyen.terminal']._sync_adyen_terminals()
+        super(AdyenAccount, self)._sync_adyen_cron()
+
     def action_order_terminal(self):
         if not self.store_ids:
             raise ValidationError(_('Please create a store first.'))
@@ -42,7 +47,7 @@ class AdyenStore(models.Model):
     @api.model
     def create(self, values):
         adyen_store_id = super(AdyenStore, self).create(values)
-        response = adyen_store_id.adyen_account_id._adyen_rpc('update_account_holder', adyen_store_id._format_data())
+        response = adyen_store_id.adyen_account_id._adyen_rpc('create_store', adyen_store_id._format_data())
         stores = response['accountHolderDetails']['storeDetails']
         created_store = next(store for store in stores if store['storeReference'] == adyen_store_id.store_reference)
         adyen_store_id.with_context(update_from_adyen=True).sudo().write({
@@ -65,7 +70,6 @@ class AdyenStore(models.Model):
                 'storeDetails': [{
                     'storeReference': self.store_reference,
                     'storeName': self.name,
-                    'merchantAccount': 'OdooMP_POS',
                     'merchantCategoryCode': '7999',
                     'address': {
                         'city': self.city,