Allow wizards to use Helm Resources

[GenosseOtt]

Description

We have added GitOps Wizard to add Sources and Kustomizations
openmcp-project/ui-frontend#374

Lets allow end users to bring their Helm charts as well

https://fluxcd.io/flux/components/helm/

Acceptance Criteria

• Support HelmRepository (TODO: Reuse existing screen? or write custom new one)
• Support HelmRelease
• (TODO: do we need HelmChart @christophrj)

Out of scope

• Please familiarize with the powerful Drift mechanism this tool brings - and create follow up items to consider and reflexct them
  https://fluxcd.io/flux/components/helm/