Update default config

Author: Davoud Eshtehari

src/Microsoft.Data.SqlClient/tests/tools/Microsoft.Data.SqlClient.TestUtilities/config.default.json

@@ -21,6 +21,8 @@
     "DNSCachingConnString": "",
     "DNSCachingServerCR": "",
     "DNSCachingServerTR": "",
+    "IsDNSCachingSupportedCR": false,
+    "IsDNSCachingSupportedTR": false,
     "IsAzureSynapse": false,
     "EnclaveAzureDatabaseConnString": "",
     "UserManagedIdentityClientId": ""