add optional wait flag to scaleWorkload function

[kale-amruta]

Change Overview

Currently ScaleWorkload function waits for the workload to be ready for the function to be complete. This PR adds a flag to make the wait optional

Pull request type

Please check the type of change your PR introduces:

• 🚧 Work in Progress
• 🌈 Refactoring (no functional changes, no api changes)
• 🐹 Trivial/Minor
• 🐛 Bugfix
• 🌻 Feature
• 🗺️ Documentation
• 🤖 Test

Issues

• Add optional argument "wait" to ScaleWorkload #1290

Test Plan

• 💪 Manual
• ⚡ Unit test
• 💚 E2E

Used the flag in cassandra blueprint, and changed the function bringupPod in restore phase and tested these scenarios

- func: ScaleWorkload
      name: bringupPod
      args:
        namespace: "{{ .StatefulSet.Namespace }}"
        name: "{{ .StatefulSet.Name }}"
        kind: StatefulSet
        replicas: "{{ .ArtifactsIn.params.KeyValue.replicaCount }}"

• Without adding flag waitForReady , the bringupPod function waited for the pods to be in ready state since thats the default behavior
• Added waitForReady: false , the bringupPod function did not wait for the pod to be in ready state and started executing the next function
• Added waitForReady: true , the bringupPod function waited for the pod to be in ready state
• Added waitForReady: "xyz" , the bringupPod function failed to execute because it needed bool value to be passed

[ihcsim]

LGTM 👍. Thanks for working on this!