[offloaders] Define treshold and deletionMaxLag per ns or use the default one. #6283
Description
Is your feature request related to a problem? Please describe.
The OffloadPolices per ns is just merged. But it's missing a point on values to trigger auto offloading: we want to define tresholdMaxBytes and deletionMaxLag per ns or use the default one configured.
Describe the solution you'd like
Add tresholdMaxBytes and deletionMaxLag in OffloadPolices and use them to defines triggers.