CBG-1071 Restore CBL pull attachment count/attachment bytes (#4768)
CBG-1071 Restore CBL pull attachment count/attachment bytes (#4768)

These were incorrectly swapped to the push stats as part of the stat format update.
couchbaselabs/sync_gateway,couchbaselabs/sync_gateway,couchbaselabs/sync_gateway,couchbaselabs/sync_gateway