win_exec: refactor PS exec runner (#45334)

* win_exec: refactor PS exec runner

* more changes for PSCore compatibility

* made some changes based on the recent review

* split up module exec scripts for smaller payload

* removed C# module support to focus on just error msg improvement

* cleaned up c# test classifier code

lib/ansible/executor/powershell/module_powershell_wrapper.ps1

@@ -0,0 +1,57 @@
+# (c) 2018 Ansible Project
+# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
+
+param(
+    [Parameter(Mandatory=$true)][System.Collections.IDictionary]$Payload
+)
+
+#AnsibleRequires -Wrapper module_wrapper
+
+$ErrorActionPreference = "Stop"
+
+Write-AnsibleLog "INFO - starting module_powershell_wrapper" "module_powershell_wrapper"
+
+$module_name = $Payload.module_args["_ansible_module_name"]
+Write-AnsibleLog "INFO - building module payload for '$module_name'" "module_powershell_wrapper"
+
+# compile any C# module utils passed in from the controller, Add-CSharpType is
+# automatically added to the payload manifest if any csharp util is set
+$csharp_utils = [System.Collections.ArrayList]@()
+foreach ($csharp_util in $Payload.csharp_utils_module) {
+    Write-AnsibleLog "INFO - adding $csharp_util to list of C# references to compile" "module_powershell_wrapper"
+    $util_code = [System.Text.Encoding]::UTF8.GetString([System.Convert]::FromBase64String($Payload.csharp_utils[$csharp_util]))
+    $csharp_utils.Add($util_code) > $null
+}
+if ($csharp_utils.Count -gt 0) {
+    $add_type_b64 = $Payload.powershell_modules["Ansible.ModuleUtils.AddType"]
+    $add_type = [System.Text.Encoding]::UTF8.GetString([System.Convert]::FromBase64String($add_type_b64))
+    New-Module -Name Ansible.ModuleUtils.AddType -ScriptBlock ([ScriptBlock]::Create($add_type)) | Import-Module > $null
+
+    # add any C# references so the module does not have to do so
+    $new_tmp = [System.Environment]::ExpandEnvironmentVariables($Payload.module_args["_ansible_remote_tmp"])
+    Add-CSharpType -References $csharp_utils -TempPath $new_tmp -IncludeDebugInfo
+}
+
+# get the common module_wrapper code and invoke that to run the module
+$variables = [System.Collections.ArrayList]@(@{ Name = "complex_args"; Value = $Payload.module_args; Scope = "Global" })
+$module = [System.Text.Encoding]::UTF8.GetString([System.Convert]::FromBase64String($Payload.module_entry))
+$entrypoint = [System.Text.Encoding]::UTF8.GetString([System.Convert]::FromBase64String($payload.module_wrapper))
+$entrypoint = [ScriptBlock]::Create($entrypoint)
+
+try {
+    &$entrypoint -Scripts $script:common_functions, $module -Variables $variables `
+        -Environment $Payload.environment -Modules $Payload.powershell_modules `
+        -ModuleName $module_name
+} catch {
+    # failed to invoke the PowerShell module, capture the exception and
+    # output a pretty error for Ansible to parse
+    $result = @{
+        msg = "Failed to invoke PowerShell module: $($_.Exception.Message)"
+        failed = $true
+        exception = (Format-AnsibleException -ErrorRecord $_)
+    }
+    Write-Output -InputObject (ConvertTo-Json -InputObject $result -Depth 99 -Compress)
+    $host.SetShouldExit(1)
+}
+
+Write-AnsibleLog "INFO - ending module_powershell_wrapper" "module_powershell_wrapper"