chore(issue-views): Add BE prompt for add view banner (#78037)

Adds the prompt for the add view banner 


[related PR](https://github.com/getsentry/sentry/pull/77878)

src/sentry/utils/prompts.py

@@ -20,6 +20,7 @@ DEFAULT_PROMPTS = {
     "data_consent_priority": {"required_fields": ["organization_id"]},
     "issue_replay_inline_onboarding": {"required_fields": ["organization_id", "project_id"]},
     "issue_feedback_hidden": {"required_fields": ["organization_id", "project_id"]},
+    "issue_views_add_view_banner": {"required_fields": ["organization_id"]},
 }