Add the conditional helper in the experiments

[ispeakc0de]

Description

• We can have different values of blast radius for an experiment, based on the use case. Adding a sample use cases:

  • Suppose we have to inject chaos on the single replica of deployment so it would be better to have a single helper pod which will help us to inject the chaos using minimal resources.
  • If we want to inject the chaos on some percentage of replicas the single pod approach won't be the best fit rather we can use the daemonset.

• Considering the ^^ above use cases, we can make our chaos experiment smarter so that it can invoke the helper pod/daemonset on the basis of the blast radius.

[ksatchit]

This has been addressed by the PODS_AFFECTED_PERC env on the experiments. We are launching multiple helper pods in case blast radius is greater than one replica, This is supported from 1.9 release