ci: surface go test failures past tee with set -o pipefail

Without pipefail, the pipeline's exit code is tee's, masking go test
failures and producing false-green workflow runs.

Author: james00012

.github/workflows/azure-integration-tests.yml

@@ -76,6 +76,7 @@ jobs:
           ARM_SUBSCRIPTION_ID: ${{ secrets.AZURE_SUBSCRIPTION_ID }}
           ARM_USE_OIDC: "true"
         run: |
+          set -o pipefail
           mkdir -p /tmp/logs
           # Scope: OIDC-compatible examples only (AzureRM provider >= 3.7).
           # Examples on AzureRM 2.x cannot authenticate via OIDC and are