Remove index and update istio-kubectl

- Remove index as we package and host our charts
- Update rancher/istio-kubectl image tag to 1.5.8

packages/rancher-gatekeeper/overlay/CHANGELOG.md

@@ -10,8 +10,10 @@ All notable changes from the upstream OPA Gatekeeper chart will be added to this
 the webhook service was removed. Ideally, we would like to remove the validation too, 
 but setting this flag achieves the same results without cluttering the patch.
 - Updated namespace to `cattle-gatekeeper-system`
+- Updated `rancher/istio-kubectl` image to `1.5.8`
 
 ### Removed
 - Removed `gatekeeper-webhook-service-service.yaml` as the `gatekeeper-webhook-service` 
 was removed in our previous version of the chart
 - Removed `gatekeeper-system-namespace.yaml` as Rancher handles namespaces for chart installation
+- Removed unnecessary `index.yaml` as we package and host our charts

packages/rancher-gatekeeper/rancher-gatekeeper.patch

@@ -19,6 +19,28 @@ diff -x '*.tgz' -x '*.lock' -uNr packages/rancher-gatekeeper/charts-original/Cha
 +  catalog.cattle.io/experimental: true
 +  catalog.cattle.io/namespace: cattle-gatekeeper-system
 +  catalog.cattle.io/release-name: rancher-gatekeeper
+diff -x '*.tgz' -x '*.lock' -uNr packages/rancher-gatekeeper/charts-original/index.yaml packages/rancher-gatekeeper/charts/index.yaml
+--- packages/rancher-gatekeeper/charts-original/index.yaml
++++ packages/rancher-gatekeeper/charts/index.yaml
+@@ -1,18 +0,0 @@
+-apiVersion: v1
+-entries:
+-  gatekeeper:
+-  - apiVersion: v1
+-    appVersion: v3.1.0-beta.11
+-    created: "2020-07-24T16:56:23.670543818-07:00"
+-    description: A Helm chart for Gatekeeper
+-    digest: 937aeddadbeac8fa1b71169c4fcde5229fa8445b0caec6339dc7cae2ac10d43f
+-    home: https://github.com/open-policy-agent/gatekeeper
+-    keywords:
+-    - open policy agent
+-    name: gatekeeper
+-    sources:
+-    - https://github.com/open-policy-agent/gatekeeper.git
+-    urls:
+-    - https://raw.githubusercontent.com/open-policy-agent/gatekeeper/v3.1.0-beta.11/charts/gatekeeper/gatekeeper-v3.1.0-beta.11.tgz
+-    version: v3.1.0-beta.11
+-generated: "2020-07-24T16:56:23.669766565-07:00"
 diff -x '*.tgz' -x '*.lock' -uNr packages/rancher-gatekeeper/charts-original/templates/_helpers.tpl packages/rancher-gatekeeper/charts/templates/_helpers.tpl
 --- packages/rancher-gatekeeper/charts-original/templates/_helpers.tpl
 +++ packages/rancher-gatekeeper/charts/templates/_helpers.tpl
@@ -351,4 +373,4 @@ diff -x '*.tgz' -x '*.lock' -uNr packages/rancher-gatekeeper/charts-original/val
 +  systemDefaultRegistry: ""
 +  kubectl:
 +    repository: rancher/istio-kubectl
-+    tag: 1.4.6
++    tag: 1.5.8