This diff introduces changes to the Tunnelbroker gRPC messages stream implementation according to the [[ https://linear.app/comm/issue/ENG-2641/disabling-messages-persistence-in-the-database-in-tunnelbroker | ENG-2641 ]] task, where we need to disable messages persistence in the DynamoDB database using the config file parameter from D6622.
In this diff, we are disabling the check for new messages in the database when the client connects to the stream if the config flag (D6622) is presented.
Linear task: [[ https://linear.app/comm/issue/ENG-2641/disabling-messages-persistence-in-the-database-in-tunnelbroker | ENG-2641 ]]