Rename snapshot_time to origin_time in communication component state

This commit renames the field `snapshot_time` to `origin_time` in the
`CommunicationComponentStateSnapshot` message. This makes the field name
consistent across `ElectricalComponentStateSnapshot` and
`SensorStateSnapshot` messages.

Signed-off-by: Tiyash Basu <[email protected]>

Author: tiyash-basu-frequenz

proto/frequenz/api/common/v1/microgrid/communication_components/communication_components.proto

@@ -174,7 +174,7 @@ message CommunicationComponentDiagnostic {
 //     happening to produce this data are collapsed under that timestamp.
 message CommunicationComponentStateSnapshot {
   // The UTC time when the state was originally captured.
-  google.protobuf.Timestamp snapshot_time = 1;
+  google.protobuf.Timestamp origin_time = 1;
 
   // one or more high-level state codes active at snapshot_time.
   //