Telemetry support for LDP and MLDP traffic statistics

The following LDP and multipoint LDP native sensors are added for the Junos telemetry interface:

• /junos/services/ldp/label-switched-path/ingress/usage/
• /junos/services/ldp/label-switched-path/transit/usage/
• /junos/services/ldp/p2mp/interface/receive/usage/
• /junos/services/ldp/p2mp/interface/transmit/usage/
• /junos/services/ldp/p2mp/label-switched-path/usage/

You must enable telemetry streaming with the sensor-based-stats option at the [edit protocols ldp traffic-statistics] hierarchy level.
The show ldp traffic-statistics command is enhanced to display upstream LDP traffic statistics and to display multipoint LDP traffic statistics per interface.