.NET: [Feature Branch] Introduce Azure OpenAI config for .NET pipeline (#2106)

Also fixes an issue where we were trying to start docker containers for integration tests on Windows, which doesn't work.

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

.github/workflows/dotnet-build-and-test.yml

@@ -150,10 +150,14 @@ jobs:
           tenant-id: ${{ secrets.AZURE_TENANT_ID }}
           subscription-id: ${{ secrets.AZURE_SUBSCRIPTION_ID }}
 
+        # This setup action is required for both Durable Task and Azure Functions integration tests.
+        # We only run it on Ubuntu since the Durable Task and Azure Functions features are not available
+        # on .NET Framework (net472) which is what we use the Windows runner for.
       - name: Set up Durable Task and Azure Functions Integration Test Emulators
-        if: github.event_name != 'pull_request' && matrix.integration-tests
+        if: github.event_name != 'pull_request' && matrix.integration-tests && matrix.os == 'ubuntu-latest'
         uses: ./.github/actions/azure-functions-integration-setup
         id: azure-functions-setup
+
       - name: Run Integration Tests
         shell: bash
         if: github.event_name != 'pull_request' && matrix.integration-tests
@@ -175,6 +179,9 @@ jobs:
           OpenAI__ApiKey: ${{ secrets.OPENAI__APIKEY }}
           OpenAI__ChatModelId: ${{ vars.OPENAI__CHATMODELID }}
           OpenAI__ChatReasoningModelId: ${{ vars.OPENAI__CHATREASONINGMODELID }}
+          # Azure OpenAI Models
+          AZURE_OPENAI_CHAT_DEPLOYMENT_NAME: ${{ vars.AZUREOPENAI__CHATDEPLOYMENTNAME }}
+          AZURE_OPENAI_ENDPOINT: ${{ vars.AZUREOPENAI__ENDPOINT }}
           # Azure AI Foundry
           AzureAI__Endpoint: ${{ secrets.AZUREAI__ENDPOINT }}
           AzureAI__DeploymentName: ${{ vars.AZUREAI__DEPLOYMENTNAME }}