feat: enable assignment v2 by default for new accounts (#14031)

## Description

Enable assignment v2 by default for new accounts

## Type of change

- [ ] New feature (non-breaking change which adds functionality)


## Checklist:

- [ ] My code follows the style guidelines of this project
- [ ] I have performed a self-review of my code
- [ ] I have commented on my code, particularly in hard-to-understand
areas
- [ ] I have made corresponding changes to the documentation
- [ ] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [ ] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published in downstream
modules

config/features.yml

@@ -190,7 +190,7 @@
   chatwoot_internal: true
 - name: assignment_v2
   display_name: Assignment V2
-  enabled: false
+  enabled: true
 - name: twilio_content_templates
   display_name: Twilio Content Templates
   enabled: false