[backport cloud/1.39] fix: default onboardingSurveyEnabled flag to false (#8831)

Backport of #8829 to `cloud/1.39`

Automatically created by backport workflow.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8831-backport-cloud-1-39-fix-default-onboardingSurveyEnabled-flag-to-false-3056d73d365081b28fb5f7b6f5042aa1)
by [Unito](https://www.unito.io)

Co-authored-by: Alexander Brown <drjkl@comfy.org>
Co-authored-by: Claude <noreply@anthropic.com>

src/composables/useFeatureFlags.ts

@@ -61,7 +61,7 @@ export function useFeatureFlags() {
     get onboardingSurveyEnabled() {
       return (
         remoteConfig.value.onboarding_survey_enabled ??
-        api.getServerFeature(ServerFeatureFlag.ONBOARDING_SURVEY_ENABLED, true)
+        api.getServerFeature(ServerFeatureFlag.ONBOARDING_SURVEY_ENABLED, false)
       )
     },
     get linearToggleEnabled() {