fix(shims): skip PowerShell common params in CLI forwarders

The blind -X -> --x shims forwarded PowerShell common parameters
(-ErrorAction, -Verbose, ...) to the Python CLI, e.g.
Measure-CIBenchmark.ps1 -> Remove-BuildVM.ps1 -ErrorAction
SilentlyContinue produced `ci_orchestrator vm remove --error-action`
-> "No such option" -> destroy failed (orphan VM left). Skip
common switches and consume value-taking ones. Applied to all 7
blind-loop shims; param-style shims (New-BuildVM, Invoke-RemoteBuild,
Get-BuildArtifacts) are not affected. PSSA clean.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

scripts/Cleanup-OrphanedBuildVMs.ps1

@@ -1,23 +1,37 @@
-#Requires -Version 5.1
-Set-StrictMode -Version Latest
-$ErrorActionPreference = 'Stop'
-
-# Shim: delegates to the Python ci_orchestrator CLI.
-# Original PS implementation moved to git history; see plans/A2-closeout.md.
-$pyArgs = @()
-foreach ($a in $args) {
-    if ($a -is [string] -and $a.Length -gt 1 -and $a.StartsWith('-') -and -not $a.StartsWith('--')) {
-        $name  = $a.Substring(1)
-        $kebab = [Regex]::Replace($name, '(?<=[a-z0-9])([A-Z])', '-$1')
-        $kebab = [Regex]::Replace($kebab, '([A-Z]+)([A-Z][a-z])', '$1-$2')
-        $pyArgs += '--' + $kebab.ToLower()
-    }
-    else {
-        $pyArgs += $a
-    }
-}
-
-$venvPython = $env:CI_VENV_PYTHON
-if (-not $venvPython) { $venvPython = 'F:\CI\python\venv\Scripts\python.exe' }
-& $venvPython -m ci_orchestrator vm cleanup @pyArgs
-exit $LASTEXITCODE
+#Requires -Version 5.1
+Set-StrictMode -Version Latest
+$ErrorActionPreference = 'Stop'
+
+# Shim: delegates to the Python ci_orchestrator CLI.
+# Original PS implementation moved to git history; see plans/A2-closeout.md.
+# PowerShell common params (-ErrorAction etc.) must not be forwarded
+# to the Python CLI. Value-taking ones also consume the next token.
+$commonWithValue = @{
+    erroraction = $true; warningaction = $true; informationaction = $true
+    progressaction = $true; errorvariable = $true; warningvariable = $true
+    informationvariable = $true; outvariable = $true; outbuffer = $true
+    pipelinevariable = $true
+}
+$commonSwitch = @{ verbose = $true; debug = $true; whatif = $true; confirm = $true }
+
+$pyArgs = @()
+for ($i = 0; $i -lt $args.Count; $i++) {
+    $a = $args[$i]
+    if ($a -is [string] -and $a.Length -gt 1 -and $a.StartsWith('-') -and -not $a.StartsWith('--')) {
+        $name  = $a.Substring(1)
+        $lname = $name.ToLower()
+        if ($commonSwitch.ContainsKey($lname)) { continue }
+        if ($commonWithValue.ContainsKey($lname)) { $i++; continue }
+        $kebab = [Regex]::Replace($name, '(?<=[a-z0-9])([A-Z])', '-$1')
+        $kebab = [Regex]::Replace($kebab, '([A-Z]+)([A-Z][a-z])', '$1-$2')
+        $pyArgs += '--' + $kebab.ToLower()
+    }
+    else {
+        $pyArgs += $a
+    }
+}
+
+$venvPython = $env:CI_VENV_PYTHON
+if (-not $venvPython) { $venvPython = 'F:\CI\python\venv\Scripts\python.exe' }
+& $venvPython -m ci_orchestrator vm cleanup @pyArgs
+exit $LASTEXITCODE