Add support empty NoteProperty in Group-Object #9109
                
     Merged
            
            
          
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PR Summary
Fix #3300
PR Context
GetHashCode evaluates a hash for base object of PSObject that can be sometimes null.
PR Checklist
.h,.cpp,.cs,.ps1and.psm1files have the correct copyright headerWIP:or[ WIP ]to the beginning of the title (theWIPbot will keep its status check atPendingwhile the prefix is present) and remove the prefix when the PR is ready.[feature]to your commit messages if the change is significant or affects feature tests