[FIX] base: skip failed autovaccum

This patch prevents bugs fixed at 5d463d2 to block the database.
It was preventing the autovacuum to properly clean old records.
Failing to unlink (may have various different reasons) should not block the
autovacuum to try on other models

Closes #23455

odoo/addons/base/ir/ir_autovacuum.py

@@ -17,7 +17,11 @@ class AutoVacuum(models.AbstractModel):
         for mname in self.env:
             model = self.env[mname]
             if model.is_transient():
-                model._transient_vacuum(force=True)
+                try:
+                    with cr.savepoint():
+                        model._transient_vacuum(force=True)
+                except Exception as e:
+                    _logger.warning("Failed to clean transient model %s\n%s", model, str(e))
 
     @api.model
     def _gc_user_logs(self):