Repair testing for openai (Azure#37879)

* ref openai test service connection

* fix yml

Author: kristapratico

sdk/openai/tests.yml

@@ -9,7 +9,11 @@ extends:
         - PythonVersion=3.11.*
       MatrixReplace:
         - TestSamples=.*/true
+      UseFederatedAuth: true
       SupportedClouds: 'Public'
+      CloudConfig:
+        Public:
+          ServiceConnection: azure-sdk-tests-openai
       EnvVars:
         AZ_OPENAI_ENDPOINT: $(AOAI-ENDPOINT)
         AZURE_OPENAI_KEY: $(AOAI-API-KEY)