fix(aliyundrive): device session signature error (#3398)

* fix signature

* fix: indent-error-flow [skip ci]

drivers/aliyundrive/global.go

@@ -0,0 +1,16 @@
+package aliyundrive
+
+import (
+	"crypto/ecdsa"
+
+	"github.com/alist-org/alist/v3/pkg/generic_sync"
+)
+
+type State struct {
+	deviceID   string
+	signature  string
+	nonce      int
+	privateKey *ecdsa.PrivateKey
+}
+
+var global = generic_sync.MapOf[string, *State]{}