windows testing - changes to accomodate future behaviour changes (#45464)

test/integration/targets/win_route/files/Test-Os.ps1

@@ -1,13 +0,0 @@
-$os = [Environment]::OSVersion
-$major = $os.Version.Major
-$minor = $os.Version.Minor
-$ok = $false
-
-if(($major -gt 6)){
-    $ok = $true
-}
-elseif (($major -eq 6) -and ($minor -ge 3)){
-    $ok = $true
-}
-
-$ok

test/integration/targets/win_route/tasks/main.yml

@@ -19,7 +19,7 @@
 
 
 - name: get os info
-  script: ../files/Test-Os.ps1
+  win_shell: '[Environment]::OSVersion.Version -ge [Version]"6.3"'
   register: os
 
 - name: Perform with os Windows 2012R2 or newer