fix(agent): use nvethernet MAC counters (#2090)

Co-authored-by: hank <hank@henrygd.me>

agent/network_counters_unsupported.go

@@ -0,0 +1,11 @@
+//go:build !linux
+
+package agent
+
+import psutilNet "github.com/shirou/gopsutil/v4/net"
+
+func isNvidiaEthernet(name string) bool {
+	return false
+}
+
+func correctNvethernetCounters(v *psutilNet.IOCountersStat) {}