Disable the missing_copy_implementations lint

As we will be adding more actions to this enum in
the future, it will soon become non-Copyable so
we don't want this lint triggering.

src/compute/servers.rs

@@ -327,6 +327,7 @@ impl Server {
 /// An action to perform on a server.
 #[derive(Clone, Debug, Serialize)]
 #[non_exhaustive]
+#[allow(missing_copy_implementations)]
 pub enum ServerAction {
     /// Starts a stopped server.
     #[serde(rename = "os-start", serialize_with = "unit_to_null")]