[client] Close the remote conn in proxy (#2626)

Port the conn close call to eBPF proxy

client/internal/wgproxy/factory_nonlinux.go

@@ -2,8 +2,20 @@
 
 package wgproxy
 
-import "context"
+import "github.com/netbirdio/netbird/client/internal/wgproxy/usp"
 
-func NewFactory(ctx context.Context, _ bool, wgPort int) *Factory {
+type Factory struct {
+	wgPort int
+}
+
+func NewFactory(_ bool, wgPort int) *Factory {
 	return &Factory{wgPort: wgPort}
 }
+
+func (w *Factory) GetProxy() Proxy {
+	return usp.NewWGUserSpaceProxy(w.wgPort)
+}
+
+func (w *Factory) Free() error {
+	return nil
+}