fix(medusa): Price selection strategy bug with customer groups without customers (#4578)

* change up condition for joining price lists

* add changeset

* naming

* update tests

integration-tests/api/__tests__/admin/variant.js

@@ -262,6 +262,12 @@ describe("/admin/products", () => {
           product_id: productData.id,
           sku: `test-product_filtering_by_variant_id-${i}`,
           title: `test-product_filtering_by_variant_id-${i}`,
+          options: [
+            {
+              option_id: "test-product_filtering_by_variant_id-option",
+              value: `Large-${i}`,
+            },
+          ],
         })
       }