Use getSuggestions endpoint behind the gate (#3499)

* Move suggested follows out of the component

* Add new suggestions implementation

* Put new endpoint behind the gate

* Make bottom less weird

src/lib/statsig/gates.ts

@@ -7,3 +7,4 @@ export type Gate =
   | 'new_search'
   | 'show_follow_back_label'
   | 'start_session_with_following'
+  | 'use_new_suggestions_endpoint'

src/lib/statsig/statsig.tsx

@@ -82,7 +82,10 @@ export function useGate(gateName: Gate): boolean {
     // This should not happen because of waitForInitialization={true}.
     console.error('Did not expected isLoading to ever be true.')
   }
-  return value
+  // This shouldn't technically be necessary but let's get a strong
+  // guarantee that a gate value can never change while mounted.
+  const [initialValue] = React.useState(value)
+  return initialValue
 }
 
 function toStatsigUser(did: string | undefined) {