Extra processing for thresholds in order to make them usable in Kibana

[marius-dr]

The way k6 outputs the threshold values makes them not really usable in Kibana (without having to use scripted fields or anything like that).
If we could get the data flattened we could plug it in the threshold functionality in Lens.

For example, I would like this output example:

      "thresholds":[
         "rate<0.01"
      ],

flattened as:
thresholds.rate: 0.01
thresholds.operator: lt (this one isn't of much use in Kibana for now, but it's good to have it saved for data integrity purposes)

There are a few more threshold options that will have to be parsed, like group specific or tag specific. We can see some samples here:
https://k6.io/docs/using-k6/thresholds/