Add (create|delete|export) source chart commands

The `create source chart` command supports all HelmChart.spec fields
except `.valuesFiles` and `ignoreMissingValuesFiles` as these are
assumingly rarely used fields and the CLI usually only supports
commonly used ones.

closes #4760

Co-authored-by: Stefan Prodan <stefan.prodan@gmail.com>
Signed-off-by: Max Jonas Werner <mail@makk.es>

cmd/flux/testdata/create_source_chart/basic.yaml

@@ -0,0 +1,14 @@
+✚ generating HelmChart source
+---
+apiVersion: source.toolkit.fluxcd.io/v1
+kind: HelmChart
+metadata:
+  name: podinfo
+  namespace: {{ .fluxns }}
+spec:
+  chart: podinfo
+  interval: 0s
+  reconcileStrategy: ChartVersion
+  sourceRef:
+    kind: HelmRepository
+    name: podinfo

cmd/flux/testdata/create_source_chart/setup-source.yaml

@@ -0,0 +1,16 @@
+---
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: {{ .fluxns }}
+---
+apiVersion: source.toolkit.fluxcd.io/v1
+kind: HelmRepository
+metadata:
+  name: podinfo
+  namespace: {{ .fluxns }}
+spec:
+  interval: 1m0s
+  provider: generic
+  type: oci
+  url: oci://ghcr.io/stefanprodan/charts

cmd/flux/testdata/create_source_chart/verify_basic.yaml

@@ -0,0 +1,16 @@
+✚ generating HelmChart source
+---
+apiVersion: source.toolkit.fluxcd.io/v1
+kind: HelmChart
+metadata:
+  name: podinfo
+  namespace: {{ .fluxns }}
+spec:
+  chart: podinfo
+  interval: 0s
+  reconcileStrategy: ChartVersion
+  sourceRef:
+    kind: HelmRepository
+    name: podinfo
+  verify:
+    provider: cosign

cmd/flux/testdata/create_source_chart/verify_complete.yaml

@@ -0,0 +1,19 @@
+✚ generating HelmChart source
+---
+apiVersion: source.toolkit.fluxcd.io/v1
+kind: HelmChart
+metadata:
+  name: podinfo
+  namespace: {{ .fluxns }}
+spec:
+  chart: podinfo
+  interval: 0s
+  reconcileStrategy: ChartVersion
+  sourceRef:
+    kind: HelmRepository
+    name: podinfo
+  verify:
+    matchOIDCIdentity:
+    - issuer: foo
+      subject: bar
+    provider: cosign

cmd/flux/testdata/export/helm-chart.yaml

@@ -0,0 +1,14 @@
+---
+apiVersion: source.toolkit.fluxcd.io/v1
+kind: HelmChart
+metadata:
+  name: flux-system
+  namespace: {{ .fluxns }}
+spec:
+  chart: podinfo
+  interval: 1m0s
+  reconcileStrategy: ChartVersion
+  sourceRef:
+    kind: HelmRepository
+    name: podinfo
+  version: '*'

cmd/flux/testdata/export/objects.yaml

@@ -124,6 +124,20 @@ spec:
   timeout: 1m0s
   url: https://stefanprodan.github.io/podinfo
 ---
+apiVersion: source.toolkit.fluxcd.io/v1
+kind: HelmChart
+metadata:
+  name: flux-system
+  namespace: {{ .fluxns }}
+spec:
+  chart: podinfo
+  interval: 1m0s
+  reconcileStrategy: ChartVersion
+  sourceRef:
+    kind: HelmRepository
+    name: podinfo
+  version: '*'
+---
 apiVersion: helm.toolkit.fluxcd.io/v2beta2
 kind: HelmRelease
 metadata: