feat: do not update messages' ttl until the new design is enabled

SessionMessagingKit/Jobs/Types/DisappearingMessagesJob.swift

@@ -90,6 +90,7 @@ public extension DisappearingMessagesJob {
         // If there were no changes then none of the provided `interactionIds` are expiring messages
         guard (changeCount ?? 0) > 0 else { return nil }
         
+        if DisappearingMessagesConfiguration.isNewConfigurationEnabled {
             interactionsByExpiresInSeconds?.forEach { expiresInSeconds, interactions in
                 let serverHashes = interactions.compactMap { $0.serverHash }
                 guard let expiresInSeconds = expiresInSeconds, !serverHashes.isEmpty else { return }
@@ -127,6 +128,7 @@ public extension DisappearingMessagesJob {
                 )
                 .retainUntilComplete()
             }
+        }
         
         return updateNextRunIfNeeded(db)
     }