fix oci:// chart (#477)

* fix oci:// chart

Signed-off-by: Quan TRAN <itscaro@users.noreply.github.com>

test/e2e/template/helmfile/testdata/snapshot/issue_473_oci_chart_url_fetch/config.yaml

@@ -0,0 +1,6 @@
+localDockerRegistry:
+  enabled: true
+  port: 5000
+chartifyTempDir: temp2
+helmfileArgs:
+- fetch

test/e2e/template/helmfile/testdata/snapshot/issue_473_oci_chart_url_fetch/input.yaml

@@ -0,0 +1,14 @@
+releases:
+- name: foo
+  chart: oci://localhost:5000/myrepo/raw
+  version: 0.1.0
+  values:
+  - templates:
+    - |
+      apiVersion: v1
+      kind: ConfigMap
+      metadata:
+        name: {{`{{ .Release.Name }}`}}
+        namespace: {{`{{ .Release.Namespace }}`}}
+      data:
+        foo: FOO

test/e2e/template/helmfile/testdata/snapshot/issue_473_oci_chart_url_fetch/output.yaml

@@ -0,0 +1,4 @@
+Pulling localhost:5000/myrepo/raw:0.1.0
+Pulled: localhost:5000/myrepo/raw:0.1.0
+Digest: $DIGEST
+