Fix log contention issue

This fixes another log contention issue we were seeing in CI. This was
not caught in dotnet#72263 because the syntax generation only ran
conditionally hence masked this problem.

azure-pipelines.yml

@@ -409,7 +409,6 @@ stages:
       - pwsh: |
           ./eng/generate-compiler-code.ps1 -test -configuration Release
         displayName: Generate Syntax Files
-        condition: or(ne(variables['Build.Reason'], 'PullRequest'), eq(variables['compilerChange'], 'true'))
 
       - pwsh: |
           ./eng/validate-code-formatting.ps1 -ci -rootDirectory $(Build.SourcesDirectory)\src -includeDirectories Compilers\CSharp\Portable\Generated\, Compilers\VisualBasic\Portable\Generated\, ExpressionEvaluator\VisualBasic\Source\ResultProvider\Generated\ 

eng/validate-rules-missing-documentation.ps1

@@ -1,30 +1,26 @@
 [CmdletBinding(PositionalBinding=$false)]
 param (
-  [switch]$ci
+  [switch]$ci = $false
 )
 
 Set-StrictMode -version 2.0
 $ErrorActionPreference="Stop"
 
-
 Write-Host "Building Microsoft.CodeAnalysis.Features"
 try {
   . (Join-Path $PSScriptRoot "build-utils.ps1")
   Push-Location $RepoRoot
+  $prepareMachine = $ci
 
   $projectFilePath = Join-Path $RepoRoot "src\Features\Core\Portable\Microsoft.CodeAnalysis.Features.csproj"
   Exec-DotNet "build $projectFilePath -t:GenerateRulesMissingDocumentation -p:RoslynEnforceCodeStyle=false -p:RunAnalyzersDuringBuild=false -p:ContinuousIntegrationBuild=$ci -c Release"
-
-  if ($LASTEXITCODE -ne 0) {
-    Write-Host "Failed with exit code $LASTEXITCODE."
-    exit $LASTEXITCODE
-  }
 }
 catch {
-  Write-Host "Error verifying rules missing documentation!"
   Write-Host $_
   Write-Host $_.Exception
   Write-Host $_.ScriptStackTrace
-  $host.SetShouldExit(1)
-  exit 1
+  ExitWithExitCode 1
+}
+finally {
+  Pop-Location
 }