Thin Windows shell access and bundle quiet validation

scripts/automation/quiet-validate.ps1

@@ -315,11 +315,11 @@ if ($IncludePlatformBuild) {
         "-Quiet",
         "-FailureTailLines", [string]$FailureTailLines
     )
-    foreach ($preset in $PlatformBuildPresets) {
-        $platformArgs += @("-Presets", $preset)
+    if ($PlatformBuildPresets.Count -gt 0) {
+        $platformArgs += @("-Presets", ($PlatformBuildPresets -join ","))
     }
-    foreach ($target in $PlatformBuildTargets) {
-        $platformArgs += @("-Targets", $target)
+    if ($PlatformBuildTargets.Count -gt 0) {
+        $platformArgs += @("-Targets", ($PlatformBuildTargets -join ","))
     }
     $result = Invoke-QuietStep `
         -Name "platform-build" `
@@ -353,8 +353,8 @@ if ($IncludeAppleRemote) {
         "-Quiet",
         "-FailureTailLines", [string]$FailureTailLines
     )
-    foreach ($preset in $AppleRemotePresets) {
-        $appleArgs += @("-Presets", $preset)
+    if ($AppleRemotePresets.Count -gt 0) {
+        $appleArgs += @("-Presets", ($AppleRemotePresets -join ","))
     }
     $result = Invoke-QuietStep `
         -Name "apple-remote-build" `