Pipeline fixes take 3 (#3465)

* Update processHelixTestFiles to use & instead of ? when appending our parameter if the url returned by helix already had parameters.

* Fix ProcessHelixFiles take 2

* respond to feedback

* remove root directory

build/Helix/ProcessHelixFiles.ps1

@@ -126,8 +126,7 @@ foreach ($testRun in $testRuns.value)
                 }
                 foreach($verificationFile in $visualTreeVerificationFiles)
                 {
-                    $directory = $(get-location).Path
-                    $destination = "$directory\$visualTreeVerificationFolder\$($verificationFile.Name)"
+                    $destination = "$visualTreeVerificationFolder\$($verificationFile.Name)"
                     $fileurl = Append-HelixAccessTokenToUrl $verificationFile.Link  $HelixAccessToken
                     try
                     {