Remove Helm and keep only operator-based deployment

[raballew]

Summary

The project has moved to operator deployment, but Helm charts, Helm helper scripts, and Helm-based install logic remain throughout the codebase. All Helm-related code should be removed.

Scope

38 files across the controller, Python packages, CI workflows, e2e tests, and documentation still reference Helm.

Affected areas

Helm chart (to be removed)

• controller/deploy/helm/ — entire Helm chart tree (43 files including templates, values, schemas)

Controller helper scripts

• controller/hack/deploy_with_helm.sh
• controller/hack/install_helm.sh
• controller/hack/utils — Helm references
• controller/Makefile — Helm-related targets

Python packages

jumpstarter-kubernetes

• cluster/helm.py — Helm chart install wrapper
• cluster/helm_test.py
• cluster/common.py — Helm references
• cluster/operations.py — Helm references
• cluster/operations_test.py
• cluster/kubectl.py — Helm references
• cluster/kubectl_test.py
• cluster/__init__.py — Helm exports
• install.py — install_helm_chart function
• install_test.py
• controller.py — Helm references
• exceptions.py — Helm-related exceptions
• __init__.py — Helm exports

jumpstarter-cli-admin

• install.py — Helm install CLI command
• install_test.py
• create.py / create_test.py — Helm references
• get.py — Helm references

CI / E2E

• .github/workflows/build-images.yaml — Helm steps
• .github/workflows/lint.yaml — Helm linting
• .github/workflows/controller-kind.yaml — Helm-based Kind setup
• e2e/tests.bats — Helm-based test setup
• e2e/setup-e2e.sh — Helm install in e2e environment
• e2e/compat/setup.sh — Helm install in compat tests
• controller/deploy/operator/test/e2e/e2e_test.go — Helm references

Documentation

• python/docs/source/getting-started/configuration/authentication.md — Helm install instructions
• controller/deploy/operator/README.md — Helm references

Other

• .cursor/rules/working-with-operator.mdc — Helm references
• controller/deploy/operator/internal/controller/jumpstarter/jumpstarter_controller.go — Helm references
• controller/internal/service/suite_test.go
• controller/internal/controller/suite_test.go

Notes

• Related open issues that reference Helm features (Shared ServiceAccount across 4 workloads with cluster-wide secrets CRUD #351, CI actions and container images use mutable tags instead of pinned digests #355, No NetworkPolicies in Helm chart #360) should be re-evaluated or closed once Helm is removed.
• E2E and CI workflows will need to be updated to use OLM-based installation instead.
• Documentation should be updated to reflect the new installation method.