Prevent FFS from saving ephemeral vars on shutdown #8005
                
     Merged
            
            
          
  Add this suggestion to a batch that can be applied as a single commit.
  This suggestion is invalid because no changes were made to the code.
  Suggestions cannot be applied while the pull request is closed.
  Suggestions cannot be applied while viewing a subset of changes.
  Only one suggestion per line can be applied in a batch.
  Add this suggestion to a batch that can be applied as a single commit.
  Applying suggestions on deleted lines is not supported.
  You must change the existing code in this line in order to create a valid suggestion.
  Outdated suggestions cannot be applied.
  This suggestion has been applied or marked resolved.
  Suggestions cannot be applied from pending reviews.
  Suggestions cannot be applied on multi-line comments.
  Suggestions cannot be applied while the pull request is queued to merge.
  Suggestion cannot be applied right now. Please check back later.
  
    
  
    
Problem
FFS has a special save method that just pulls all variables and saves them on shutdown, bypassing the normal methods of variable saving. This is poor design but fixing it is out of scope for this pr.
Solution
Adds checks for ephemeral vars in the FFS save treemap method.
Testing Completed
Manual testing
Supporting Information
Completes: #8004
Related: none