[FIX] account: import invoice with tax

The import feature is using a `=` as the operator.

To reproduce:
Import a file like this
```
partner_id,journal_id,currency_id,date,invoice_line_ids/account,invoice_line_ids/name,invoice_line_ids/quantity,invoice_line_ids/price_unit,invoice_line_ids/taxes
Publiroute,Customer invoices,EUR,18/06/2021,700000,Prof services 05/2021,1,100,21%
```

In this case, the ORM would look for a tax with the name equal to `2%1`
instead of `21%`.

This of course valid for any other way of using the equality operator in
the domain.

closes odoo/odoo#104764

X-original-commit: af46d8a567215a07b18d00f7d513681d385a8e7b
Signed-off-by: Julien Castiaux <juc@odoo.com>
Signed-off-by: William André (wan) <wan@odoo.com>

addons/account/models/account_tax.py

@@ -193,12 +193,14 @@ class AccountTax(models.Model):
         return '%'.join(list(name))
 
     @api.model
-    def name_search(self, name='', args=None, operator='ilike', limit=100):
-        return super().name_search(name=AccountTax._parse_name_search(name), args=args, operator=operator, limit=limit)
+    def _name_search(self, name='', args=None, operator='ilike', limit=100, name_get_uid=None):
+        if operator in ("ilike", "like"):
+            name = AccountTax._parse_name_search(name)
+        return super()._name_search(name, args, operator, limit, name_get_uid)
 
     def _search_name(self, operator, value):
         if operator not in ("ilike", "like") or not isinstance(value, str):
-            return super()._search_name(operator, value)
+            return [('name', operator, value)]
         return [('name', operator, AccountTax._parse_name_search(value))]
 
     def _check_repartition_lines(self, lines):