JTI support for persistent active gRPC sessions between collector and server during an SSL certificate update

Devices supports persistent active remote procedure call (gRPC) sessions between the collector (client) and server during an SSL certificate update. For secure channel authentication, the TLS protocol is used to maintain a secure channel between the collector and the server. TLS uses the server certificate and the client certificate to authenticate each other and send encrypted messages over the network. When an SSL certificate is updated, existing gRPC sessions are abruptly terminated, forcing the collector to initiate a new gRPC connection and subscribe to sensors again. To avoid this problem, you can enable persistent active gRPC sessions by configuring hot-reloading at the [edit system services extension-service request-response grpc ssl] hierarchy level. After you enable this feature, gRPC sessions will remain active even when authentication certificates are updated. After the certificate is updated, any new gRPC session will use the updated certificate.