doc: re-write augmentations docs
doc: re-write augmentations docs

Rewrite the "Output processors and Instruments" section into
"Augmentations" section.

lisatn/workload-automation,setrofim/workload-automation,ARM-software/workload-automation,lisatn/workload-automation,lisatn/workload-automation,ARM-software/workload-automation,setrofim/workload-automation,ARM-software/workload-automation,ARM-software/workload-automation,setrofim/workload-automation,setrofim/workload-automation,lisatn/workload-automation