Prevent redeeming invite codes after the VPN test ends (#2559)

Task/Issue URL: https://app.asana.com/0/414235014887631/1206789264380520/f
Tech Design URL:
CC:

Description:

This is the iOS equivalent of duckduckgo/macos-browser#2347.

DuckDuckGo/AppDelegate+Waitlists.swift

@@ -22,6 +22,7 @@ import Core
 import BackgroundTasks
 import NetworkProtection
 import Waitlist
+import BrowserServicesKit
 
 extension AppDelegate {
 
@@ -51,12 +52,17 @@ extension AppDelegate {
 
         VPNWaitlist.shared.fetchInviteCodeIfAvailable { [weak self] error in
             guard error == nil else {
-#if !DEBUG
+
                 if error == .alreadyHasInviteCode, UIApplication.shared.applicationState == .active {
                     // If the user already has an invite code but their auth token has gone missing, attempt to redeem it again.
                     let tokenStore = NetworkProtectionKeychainTokenStore()
                     let waitlistStorage = VPNWaitlist.shared.waitlistStorage
-                    if let inviteCode = waitlistStorage.getWaitlistInviteCode(), !tokenStore.isFeatureActivated {
+                    let configManager = ContentBlocking.shared.privacyConfigurationManager
+                    let waitlistBetaActive = configManager.privacyConfig.isSubfeatureEnabled(NetworkProtectionSubfeature.waitlistBetaActive)
+
+                    if let inviteCode = waitlistStorage.getWaitlistInviteCode(),
+                       !tokenStore.isFeatureActivated,
+                       waitlistBetaActive {
                         let pixel: Pixel.Event = .networkProtectionWaitlistRetriedInviteCodeRedemption
 
                         do {
@@ -72,7 +78,7 @@ extension AppDelegate {
                         self?.fetchVPNWaitlistAuthToken(inviteCode: inviteCode)
                     }
                 }
-#endif
+
                 return
 
             }