win_group_membership - fix random issue with CI on 2012 R2

[jborean93]

SUMMARY

As part of #45334, I found that win_group_membership occasionally fails to cast the ADSI object object when getting the group membership with

Cannot convert value "System.__ComObject" to type "System.DirectoryServices.DirectoryEntry". Error: "COM object that has been separated from its underlying RCW cannot be used."
At line:51 char:58
+     $current_members = $Group.psbase.Invoke("Members") | ForEach-Object {
+                                                          ~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidArgument: (:) [ForEach-Object], RuntimeException
    + FullyQualifiedErrorId : InvalidCastConstructorException,Microsoft.PowerShell.Commands.ForEachObjectCommand
ScriptStackTrace:
at <ScriptBlock>, <No file>: line 54
at Get-GroupMember, <No file>: line 51
at <ScriptBlock>, <No file>: line 106

Changing the method to cast it just once before running the InvokeGet methods fixed this issue in that branch. Creating a separate PR so I can backport the changes without relying on a feature PR.

ISSUE TYPE

• Bugfix Pull Request

COMPONENT NAME

win_group_membership

ANSIBLE VERSION

devel

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cc @andrewsaraceni @dagwieers @jhawkesworth @nitzmahone
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[jborean93]

Backport PRs
stable-2.6 #45470
stable-2.7 #45471