Add middleware for setting lastEdited and lastEditedBy

[mattwalo32]

This may not be possible, but it's worth looking into

[ashayp22]

I was going to add this to #550, but I was unable to think of a way to set up a middleware. This is because lastEdited and lastEditedBy is set after getting patientData and patientStepData in the body of the function for a specific request. For #550, I initially set up a middleware that sets lastEdited for Note/MultiLine fields that require it (and not step and patient), but I then moved this to the frontend since it allowed lastEdited to only update after the user changes the field. It would be overcomplicated to update lastEdited on the backend in this case.