cluster: helm: Fix Helm repo installation and refresh

[pozgo]

No description provided.

[pozgo]

Make sure wait 10s is moved to helm function instead of main func

myiac/internal/cluster/cluster.go

Line 68 in d71cffd

log.Println("Waiting 10 seconds for cluster to stabilize before taking next steps\n")

[dfernandezm]

Also, no need to use install-helm.sh and the surrounding setup. Originally this was setup with Helm 2. The syntax to install/upgrade is different too. Already tracking upgrade through SDK in #26 , but can consider just a minor commandline change.

About that 10s wait, some time is needed after the cluster is up (terraform apply finishes) and actioning it (install helm). With v3 this goes away.

Proposal:

• Refactor helmDeployer / helm.go / deploy.go so it works with Helm v3 (need issue created) - estimate 1 day for it to work with v3
• Future inclusion of wrapper which removes the need for the helm binary (Use helm wrapper  #26) - need investigation for assessing estimate