vmm: config: Implement Clone for NetConfig

The custom version duplicates any FDs that have been provided so that
the validation logic used on hotplug, which takes a clone of the config,
can be safely carried out.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>

vmm/src/vm_config.rs

@@ -183,7 +183,7 @@ impl Default for MemoryConfig {
     }
 }
 
-#[derive(Clone, Debug, PartialEq, Eq, Deserialize, Serialize, Default)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Deserialize, Serialize, Default)]
 pub enum VhostMode {
     #[default]
     Client,
@@ -248,7 +248,7 @@ impl Default for DiskConfig {
     }
 }
 
-#[derive(Clone, Debug, PartialEq, Eq, Deserialize, Serialize)]
+#[derive(Debug, PartialEq, Eq, Deserialize, Serialize)]
 pub struct NetConfig {
     #[serde(default = "default_netconfig_tap")]
     pub tap: Option<String>,