Move metrics subtable to root PV table (#2007)

Author: samfreund

photon-core/src/main/java/org/photonvision/common/dataflow/networktables/NetworkTablesManager.java

@@ -55,6 +55,7 @@ public class NetworkTablesManager {
 
     private final NetworkTableInstance ntInstance = NetworkTableInstance.getDefault();
     private final String kRootTableName = "/photonvision";
+    // The coprocessors table should only be used for operations/data related to MAC address
     public final String kCoprocTableName = "coprocessors";
     private final String kFieldLayoutName = "apriltag_field_layout";
     public final NetworkTable kRootTable = ntInstance.getTable(kRootTableName);

photon-core/src/main/java/org/photonvision/common/hardware/metrics/MetricsManager.java

@@ -45,7 +45,7 @@ public class MetricsManager {
 
     ProtobufPublisher<DeviceMetrics> metricPublisher =
             NetworkTablesManager.getInstance()
-                    .kCoprocTable
+                    .kRootTable
                     .getSubTable("/metrics")
                     .getProtobufTopic(CameraServerJNI.getHostname(), DeviceMetrics.proto)
                     .publish();