feat(aliyun): implement metadata token authentication

- Add token-based authentication for metadata requests
- Implement token caching and automatic refresh
- Update metadata retrieval functions to use token authentication
- Handle token expiration and unauthorized access errors
- Remove unnecessary error handling code

Signed-off-by: l1b0k <[email protected]>

Author: l1b0k

daemon/server.go

@@ -16,6 +16,7 @@ import (
 	"syscall"
 	"time"
 
+	"github.com/AliyunContainerService/terway/pkg/aliyun/metadata"
 	"github.com/alexflint/go-filemutex"
 	"github.com/go-logr/logr"
 	"k8s.io/apimachinery/pkg/util/wait"
@@ -227,7 +228,7 @@ func runDebugServer(ctx context.Context, wg *sync.WaitGroup, debugSocketListen s
 func registerPrometheus() {
 	prometheus.MustRegister(metric.RPCLatency)
 	prometheus.MustRegister(metric.OpenAPILatency)
-	prometheus.MustRegister(metric.MetadataLatency)
+	prometheus.MustRegister(metadata.MetadataLatency)
 	// ResourcePool
 	prometheus.MustRegister(metric.ResourcePoolTotal)
 	prometheus.MustRegister(metric.ResourcePoolIdle)