Customer group not taken into account when using "is_discount" special attribute

[romainruaud]

Preconditions

Magento Version : all

ElasticSuite Version : all

Environment : all

Third party modules : none

Steps to reproduce

1. Have products discounted for particular customer groups
2. Build a rule (virtual category or optimizer) using the "only discounted products" condition
3. Browse the front-office on a page where this rule should be triggered

Expected result

1. Only products discounted for the current customer group should be considered

Actual result

1. Products discounted for any customer group are considered

The built query is generated by this class and looks like this :

"bool": {
                    "must": [
                      {
                        "nested": {
                          "path": "price",
                          "score_mode": "none",
                          "query": {
                            "terms": {
                              "price.is_discount": [
                                true
                              ],
                              "boost": 1
                            }
                          },
                          "boost": 1
                        }
                      }
                    ],

It should include a nested field to target explicitely the current customer group.

[romainruaud]

The query should be written as nested query, like it's done here : https://github.com/Smile-SA/elasticsuite/blob/2.10.x/src/module-elasticsuite-catalog/Model/Layer/Filter/Price.php#L165

But customer group id should be added to the clause only for frontend.