Allow to pass Group parameter to Remove-PnPGroupMember from pipeline (#3955)

Co-authored-by: Gautam Sheth <gautamdsheth@outlook.com>

Author: jackpoz

src/Commands/Principals/RemoveGroupMember.cs

@@ -15,7 +15,7 @@ public class RemoveUserFromGroup : PnPWebCmdlet
         [Parameter(Mandatory = true)]
         public string LoginName = string.Empty;
 
-        [Parameter(Mandatory = true)]
+        [Parameter(Mandatory = true, ValueFromPipeline = true)]
         [Alias("Identity")]
         public GroupPipeBind Group;