Complete rewrite of Windows exec wrapper (#21510)

* supports pipelining for faster execution
* supports become (runas), creates interactive subsession under WinRM batch logon
* supports usage of arbitrary module_utils files
* modular exec wrapper payload supports easier extension
* integrates async wrapper behavior for pipelined/become'd async
* module_utils are loaded as true Powershell modules, no more runtime modifications to module code

lib/ansible/module_utils/powershell.ps1

@@ -27,15 +27,7 @@
 #
 
 Set-StrictMode -Version 2.0
-
-# Ansible v2 will insert the module arguments below as a string containing
-# JSON; assign them to an environment variable and redefine $args so existing
-# modules will continue to work.
-$complex_args = @'
-<<INCLUDE_ANSIBLE_MODULE_JSON_ARGS>>
-'@
-Set-Content env:MODULE_COMPLEX_ARGS -Value $complex_args
-$args = @('env:MODULE_COMPLEX_ARGS')
+$ErrorActionPreference = "Stop"
 
 # Helper function to set an "attribute" on a psobject instance in powershell.
 # This is a convenience to make adding Members to the object easier and
@@ -161,7 +153,7 @@ Function Get-AnsibleParam($obj, $name, $default = $null, $resultobj = @{}, $fail
 
         # Iterate over aliases to find acceptable Member $name
         foreach ($alias in $aliases) {
-            if (Get-Member -InputObject $obj -Name $alias) {
+            if ($obj.ContainsKey($alias)) {
                 $found = $alias
                 break
             }
@@ -217,7 +209,6 @@ If (!(Get-Alias -Name "Get-attr" -ErrorAction SilentlyContinue))
     New-Alias -Name Get-attr -Value Get-AnsibleParam
 }
 
-
 # Helper filter/pipeline function to convert a value to boolean following current
 # Ansible practices
 # Example: $is_true = "true" | ConvertTo-Bool
@@ -251,6 +242,9 @@ Function Parse-Args($arguments, $supports_check_mode = $false)
     {
         $params = Get-Content $arguments[0] | ConvertFrom-Json
     }
+    Else {
+        $params = $complex_args
+    }
     $check_mode = Get-AnsibleParam -obj $params -name "_ansible_check_mode" -type "bool" -default $false
     If ($check_mode -and -not $supports_check_mode)
     {
@@ -314,4 +308,7 @@ Function Get-PendingRebootStatus
     {
         return $False
     }
-}
+}
+
+# this line must stay at the bottom to ensure all defined module parts are exported
+Export-ModuleMember -Alias * -Function * -Cmdlet *