Update validation group in checkout complete (#18371)

| Q               | A
|-----------------|-----
| Branch?         | 1.14
| Bug fix?        | no
| New feature?    | no
| BC breaks?      | no
| Related tickets | https://github.com/Sylius/Sylius/issues/16151
| License         | MIT

- Removed validation group from route file;
- Added validation group to parameters.

UPGRADE-1.14.md

@@ -1,3 +1,24 @@
+# UPGRADE FROM `v1.14.11` TO `v1.14.12`
+
+## Configuration
+
+1. Checkout Complete validation groups
+The validation_groups for the `sylius_shop_checkout_complete` step are no longer defined in routing.
+They are now configured via the `sylius.form.type.checkout_complete.validation_groups parameter`, consistent with other checkout steps.
+
+When overriding this parameter in your application, keep in mind that it replaces the default list rather than merging with it.
+To preserve the existing behaviour, make sure to include both `sylius` and `sylius_checkout_complete` in addition to any custom groups you need.
+
+Example configuration:
+
+```yaml
+parameters:
+    sylius.form.type.checkout_complete.validation_groups:
+        - sylius
+        - sylius_checkout_complete
+        - my_custom_group
+```
+
 # UPGRADE FROM `v1.14.10` TO `v1.14.11`
 
 ## Classes and Interfaces Deprecations

src/Sylius/Bundle/CoreBundle/Resources/config/services/checkout.xml

@@ -34,6 +34,7 @@
         </parameter>
         <parameter key="sylius.form.type.checkout_complete.validation_groups" type="collection">
             <parameter>sylius</parameter>
+            <parameter>sylius_checkout_complete</parameter>
         </parameter>
     </parameters>
 

src/Sylius/Bundle/ShopBundle/Resources/config/routing/checkout.yml

@@ -87,5 +87,3 @@ sylius_shop_checkout_complete:
                     tokenValue: resource.tokenValue
             form:
                 type: Sylius\Bundle\CoreBundle\Form\Type\Checkout\CompleteType
-                options:
-                    validation_groups: 'sylius_checkout_complete'