Clean up analyzer warnings across app search and ISO workflows (#4794)

* Clean up analyzer warnings

* Align analyzer warning cleanup policy

* Run PSScriptAnalyzer directly in unittests workflow

* Bind lazy-rendered buttons to click handlers

* Remove WinUtil performance tracing

* Fix Win11 ISO creator temp directory reuse

functions/private/Initialize-WinUtilRunspacePool.ps1

@@ -34,6 +34,5 @@ function Initialize-WinUtilRunspacePool {
     )
 
     $sync.runspace.Open()
-    Write-WinUtilPerformanceCheckpoint -Name "Runspace pool initialized"
     return $sync.runspace
 }