Djurek/docindex-arbitrary-branch-name (Azure#27911)

* Record output for displaying error messages in devops

* Upgrade to match Docs CI Python Version

Author: danieljurek

eng/pipelines/docindex.yml

@@ -14,11 +14,11 @@ jobs:
       DocRepoName: azure-docs-sdk-python
       DocValidationImageId: azuresdkimages.azurecr.io/pyrefautocr:latest
     steps:
-      # Docs CI uses Python 3.6.8 but that is not available on this image
+      # Docs CI uses Python 3.9.13
       - task: UsePythonVersion@0
-        displayName: 'Use Python 3.6'
+        displayName: 'Use Python 3.9.13'
         inputs:
-          versionSpec: '3.6'
+          versionSpec: '3.9.13'
 
       # Docs CI upgrades pip, wheel, and setuptools
       - pwsh: pip install --upgrade pip wheel setuptools

eng/scripts/Language-Settings.ps1

@@ -258,15 +258,15 @@ function FallbackValidation
         $packageExpression `
         --no-cache-dir `
         --target $installTargetFolder `
-        --extra-index-url=$PackageSourceOverride 2>&1 | Out-Null
+        --extra-index-url=$PackageSourceOverride 2>&1
     }
     else {
       Write-Host "pip install $packageExpression --no-cache-dir --target $installTargetFolder"
       $pipInstallOutput = pip `
         install `
         $packageExpression `
         --no-cache-dir `
-        --target $installTargetFolder 2>&1 | Out-Null
+        --target $installTargetFolder 2>&1
     }
     if ($LASTEXITCODE -ne 0) {
       LogWarning "pip install failed for $packageExpression"