Add Helm Support to Release Manager

[serverhorror]

Is your feature request related to a problem? Please describe.

There are a quite a few cases where helm is needed/helpful to deploy and to be able to deploy via release manager

Describe the solution you'd like

The ods-infra type can already deploy helm charts. Right now this is deliberately prohibited:

• ods-jenkins-shared-library/src/org/ods/component/RolloutOpenShiftDeploymentStage.groovy

  Lines 127 to 130 in de3b3eb

  	if (context.triggeredByOrchestrationPipeline) {
  	steps.error "Helm cannot be used in the orchestration pipeline yet."
  	return
  	}

Describe alternatives you've considered

Nothing alternative considered

Additional context

This has been discussed in #554 already so this issue is to have a focused discussion about specifically helm and release manager.

1. I have a branch ready that allows helm charts to promote to P from D and can send it as a PR.
2. I haven't found a good place for the docs yet, any hint is appreciated

• serverhorror@06b18f7

[serverhorror]

This is also in relation to these: #537, #554

[serverhorror]

@s2oBCN -- ping! A little help how a good test would look like is much appreciated

[serverhorror]

related #916

[braisvq1996]

Closed by PR #916