fix(deps): update dependency @opentelemetry/sdk-metrics to v2

Author: renovate-bot

package.json

@@ -46,7 +46,7 @@
     "@google-cloud/spanner": "^7.21.0",
     "@opentelemetry/api": "^1.9.0",
     "@opentelemetry/exporter-metrics-otlp-grpc": "^0.57.2",
-    "@opentelemetry/sdk-metrics": "^1.30.1",
+    "@opentelemetry/sdk-metrics": "^2.1.0",
     "@opentelemetry/sdk-node": "^0.57.2",
     "@opentelemetry/semantic-conventions": "^1.30.0",
     "@types/express": "^5.0.3",