Use helm chart for deploying garm-operator

[gustaff-weldon]

What is the feature you would like to have?

Instead of deploying manifests which first have to be processed via envsubst garm-operator could be released as helm chart where all necessary customisations can be done via values.

Anything else you would like to add?

No response

[bavarianbidi]

the operator got created with kubebuilder. And kubebuilder is taking care of updating manifests when certain changes in the code happens.

The biggest concern about having a helm-chart as well is the fact, that a helm-chart needs manual maintenance.
We've initially take a look at helmify to generate a helm-chart as well but decided to not use it for now. But this is more a reason from a capacity point of view rather than a "we do not want to have this" reason 😅

FYI: There is currently an ongoing discussion to generate helm charts with kubebuilder (xref: ✨[WIP]feat: Add the proposal about the helm chart autogenerate plugin.). Once this has landed in kubebuilder, i'm sure we will adapt this feature as well.

cc @H777K as my favorite helm user ;-)