fix: Support for kustomization as chart

A kustomization has not been properly chartified when a kustomization is specified on `releases[].chart` but there were no `releases[].strategicMergePatches` and `jsonPatches` specified.
This fixes that.

test/advanced/helmfile.yaml

@@ -0,0 +1,49 @@
+repositories:
+- name: incubator
+  url: https://kubernetes-charts-incubator.storage.googleapis.com
+
+releases:
+- name: kustomapp
+  chart: ./kustomapp
+  values:
+  - namePrefix: kustomapp-
+- name: raw1
+  chart: incubator/raw
+  values:
+  - resources:
+    - apiVersion: v1
+      kind: ConfigMap
+      metadata:
+        name: raw1
+        namespace: default
+      data:
+        foo: FOO
+  strategicMergePatches:
+    - apiVersion: v1
+      kind: ConfigMap
+      metadata:
+        name: raw1
+        namespace: default
+      data:
+        bar: BAR
+- name: raw2
+  chart: incubator/raw
+  values:
+  - resources:
+    - apiVersion: v1
+      kind: ConfigMap
+      metadata:
+        name: raw2
+        namespace: default
+      data:
+        foo: FOO
+  jsonPatches:
+  - target:
+      version: v1
+      kind: ConfigMap
+      name: raw2
+      namespace: default
+    patch:
+      - op: replace
+        path: /data/baz
+        value: "BAZ"

test/advanced/kustomapp/all.yaml

@@ -0,0 +1,7 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: kustomapp
+  namespace: default
+data:
+  kustomappfoo: FOO

test/advanced/kustomapp/kustomization.yaml

@@ -0,0 +1,2 @@
+resources:
+- all.yaml

test/advanced/kustomapp2/all.yaml

@@ -0,0 +1,7 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: kustomapp2
+  namespace: default
+data:
+  kustomappfoo: FOO

test/advanced/kustomapp2/kustomization.yaml

@@ -0,0 +1,2 @@
+resources:
+- all.yaml