[FIX] account_edi_proxy_client: neutralize proxy user

Since commit 8590c6a, the edi proxy user is no more neutralized.
Now proxy users related to l10n_it_edi are set to 'demo' mode and other users
are set to 'test' mode.

opw-3439385

closes odoo/odoo#129935

X-original-commit: 4b8759d340e7ad2ae38572f374726087db2437cf
Signed-off-by: Laurent Smet (las) <las@odoo.com>
Signed-off-by: Thomas Beckers (tbs) <tbs@odoo.com>

addons/account_edi_proxy_client/data/neutralize.sql

@@ -1,5 +1,6 @@
 -- disable edi connections in general, and the Italian one (l10n_it_edi_sdicoop) in particular
-INSERT INTO ir_config_parameter (key, value)
-VALUES ('account_edi_proxy_client.demo', true)
-    ON CONFLICT (key) DO
-       UPDATE SET value = true;
+UPDATE account_edi_proxy_client_user
+SET edi_mode = CASE
+                    WHEN proxy_type = 'l10n_it_edi' THEN 'demo'
+                    ELSE 'test'
+               END;