make cloud onboarding survey disableable via runtime feature flag (#7407)

## Summary

The survey is causing some friction. It incurs about 5-10% dropoff.
Although that number is actually somewhat slow, the information has
mostly served its purpose for now. We can toggle it freely once this PR
is merged.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-7407-make-cloud-onboarding-survey-disableable-via-runtime-feature-flag-2c76d73d365081648195f322cb0d7a64)
by [Unito](https://www.unito.io)

src/composables/useFeatureFlags.ts

@@ -13,7 +13,8 @@ export enum ServerFeatureFlag {
   MODEL_UPLOAD_BUTTON_ENABLED = 'model_upload_button_enabled',
   ASSET_UPDATE_OPTIONS_ENABLED = 'asset_update_options_enabled',
   PRIVATE_MODELS_ENABLED = 'private_models_enabled',
-  SUBSCRIPTION_TIERS_ENABLED = 'subscription_tiers_enabled'
+  SUBSCRIPTION_TIERS_ENABLED = 'subscription_tiers_enabled',
+  ONBOARDING_SURVEY_ENABLED = 'onboarding_survey_enabled'
 }
 
 /**
@@ -66,6 +67,12 @@ export function useFeatureFlags() {
           true // Default to true (new design)
         )
       )
+    },
+    get onboardingSurveyEnabled() {
+      return (
+        remoteConfig.value.onboarding_survey_enabled ??
+        api.getServerFeature(ServerFeatureFlag.ONBOARDING_SURVEY_ENABLED, true)
+      )
     }
   })