Add azure-sdk-for-net-track2 in private repo (Azure#19214)

Author: dw511214992

specificationRepositoryConfiguration.json

@@ -71,6 +71,11 @@
           "integrationRepository": "azure-sdk/azure-sdk-for-net-pr",
           "mainRepository": "Azure/azure-sdk-for-net-pr"
         },
+        "azure-sdk-for-net-track2": {
+          "integrationRepository": "azure-sdk/azure-sdk-for-net-pr",
+          "mainRepository": "Azure/azure-sdk-for-net-pr",
+          "configFilePath": "eng/swagger_to_sdk_config.json"
+        },
         "azure-sdk-for-python": {
           "integrationRepository": "azure-sdk/azure-sdk-for-python-pr",
           "mainRepository": "Azure/azure-sdk-for-python-pr"