added option for external secret

[bryankmorrow]

Allow the creation of an external secret from an already existing secret store

[sudoesnt]

Testing to see if I have write access.

[ofirc-wiz]

Hey @bryankmorrow thanks a lot for the PR!
I recognize the value that this PR brings to the table, I'm wondering though whether we should leave it to the starter kits, e.g.
https://github.com/wiz-sec/kubernetes-starter-kits/pull/2

As the secrets have a different lifecycle than the chart and ESO is yet another 3rd party component, decoupled from Wiz.
What your thoughts on this?

[nxf5025]

@ofirc-wiz - Seems that starter kit link is dead...However, I'd recommend just doing a generic extraObjects arg like what is proposed in #188. That way it can support other secret management utils like the secrets store csi driver which uses a secretProviderClass without needing a chart update.

This approach has been adopted in many other projects:

• feat(argo-cd): Added ability to deploy extra K8s manifests argoproj/argo-helm#1094
• [promtail] Add extra (dynamic) Manifests to chart grafana/helm-charts#974
• Added ability to deploy extra K8s manifests oauth2-proxy/manifests#76