[FIX] account, l10n_ch: enable new taxes after module update

Swiss taxes retrieved by module update (and the update of taxes it triggers)
need to be active, even if the template data was set to inactive.

closes odoo/odoo#113001

Signed-off-by: Olivier Colson (oco) <oco@odoo.com>

addons/account/models/chart_template.py

@@ -212,6 +212,7 @@ def update_taxes_from_templates(cr, chart_template_xmlid):
         _notify_accountant_managers(outdated_taxes)
     if hasattr(chart_template, 'spoken_languages') and chart_template.spoken_languages:
         _process_taxes_translations(chart_template, new_template2tax)
+    return new_template2tax
 
 #  ---------------------------------------------------------------
 #   Account Templates: Account, Tax, Tax Code and chart. + Wizard

addons/l10n_ch/migrations/11.1/end-migrate_update_taxes.py

 # Part of Odoo. See LICENSE file for full copyright and licensing details.
+from odoo import api, SUPERUSER_ID
 from odoo.addons.account.models.chart_template import update_taxes_from_templates
 
 
 def migrate(cr, version):
-    update_taxes_from_templates(cr, 'l10n_ch.l10nch_chart_template')
+    new_template_to_tax = update_taxes_from_templates(cr, 'l10n_ch.l10nch_chart_template')
+    _, new_tax_ids = zip(*new_template_to_tax)
+    env = api.Environment(cr, SUPERUSER_ID, {})
+    env['account.tax'].browse(new_tax_ids).active = True