Fix failing ProcessGroupXCCL tests #2231
                
     Merged
            
            
          
      
        
          +6
        
        
          −6
        
        
          
        
      
    
  
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Fixes #2135
Failing ProcessGroupXCCL tests were caused by the group ID not being properly set due to redefinition of some terms that were defined in the parent Backend::Options class.
In addition, I removed part of the test which checks on completed work, since the completed work will be recorded more correctly as part of an update to add the Watchdog functionality to ProcessGroupXCCL.