This change makes the etcd package compatible with the existing Go
ecosystem for module versioning.
Used this tool to update package imports:
https://github.com/KSubedi/gomove
This PR adds another probing routine to monitor the connection
for Raft message transports. Previously, we only monitored
snapshot transports.
In our production cluster, we found one TCP connection had >8-sec
latencies to a remote peer, but "etcd_network_peer_round_trip_time_seconds"
metrics shows <1-sec latency distribution, which means etcd server
was not sampling enough while such latency spikes happen
outside of snapshot pipeline connection.
Signed-off-by: Gyuho Lee <leegyuho@amazon.com>
