Conformance results for v1.33/previder (#3699)

Signed-off-by: Gijs Middelkamp <g.middelkamp@previder.nl>

v1.33/previder/PRODUCT.yaml

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+vendor: Previder
+name: Previder Kubernetes Engine
+description: Previder Kubernetes Engine is a managed Kubernetes service to help users focus on their development as we take care of the maintenance and updates of the container infrastructure
+version: v1.0
+website_url: https://previder.nl
+documentation_url: https://previder.nl/diensten/kubernetes-as-a-service
+type: hosted
+contact_email_address: managed@previder.nl

v1.33/previder/README.md

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+# To reproduce
+
+## Set up the cluster
+
+1. Login to https://portal.previder.com
+2. Make sure you have your infrastructure all setup (Network, Gateway, DNS, DHCP)
+2. Navigate to menu option Kubernetes and choose Clusters
+2. Press the "New Cluster" button.
+2. Create a cluster with the next specifications:
+   - Any type
+   - High available control plane off
+   - At least medium worker node size
+   - At least 2 worker nodes
+2. Choose a cluster name e.g. "Conformance 1.33"
+2. Disable the automatic updates option and select Kubernetes version v1.33.x.
+2. Choose Calico as pre-installed CNI because Cilium fails to pass the conformance tests.([Github issue](https://github.com/cilium/cilium/issues/9207))
+
+Download the kubeconfig file, when the cluster state is ready, via the endpoints tab in the cluster details.
+
+## Run Sonobuoy conformance test
+Download the latest [Sonobuoy binary](https://github.com/vmware-tanzu/sonobuoy/releases) and run with your downloaded config.
+```bash
+./sonobuoy run --mode=certified-conformance --wait --kubeconfig ~/Downloads/Conformance\ 1.33-kubeconfig
+```
+
+These tests will take up to two hours, depending on your cluster's capacity.
+
+## Get Sonobuoy results
+After the tests finish, retrieve the results using your downloaded kubeconfig.
+```bash
+outfile=$(./sonobuoy retrieve --kubeconfig ~/Downloads/Conformance\ 1.33-kubeconfig)
+mkdir ./results; tar xzf $outfile -C ./results
+```
+