Conformance results for v1.31/microk8s (#3556)

Signed-off-by: Claudiu Belu <[email protected]>

v1.31/microk8s/PRODUCT.yaml

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+vendor: Canonical Ltd
+name: MicroK8s
+version: v1.31.3
+website_url: https://microk8s.io
+documentation_url: https://microk8s.io/docs/
+product_logo_url: https://assets.ubuntu.com/v1/9309d097-MicroK8s_SnapStore_icon.svg
+type: distribution
+description: 'A small, fast, single-package Kubernetes for developers, IoT and edge.'
+contact_email_address: [email protected]

v1.31/microk8s/README.md

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+# Reproducing the test results
+
+## Deploy MicroK8s
+
+Follow the instructions at https://microk8s.io to snap install microk8s on two machines.
+```sh
+$ sudo snap install microk8s --channel 1.31/stable --classic
+```
+
+Create a cluster by running on the first machine:
+```sh
+$ sudo microk8s add-node
+```
+
+Use the connection string on the second machine to form the cluster:
+```sh
+$ sudo microk8s join 10.227.69.102:25000/d35aea1606887db2ea326ed6de93c321/cb463cb3b0e4 --worker
+``` 
+
+## Trigger the tests and get back the results
+
+We follow the [official instructions](https://github.com/cncf/k8s-conformance/blob/master/instructions.md):
+
+## Run Conformance Test
+
+1. Download a [binary release](https://github.com/heptio/sonobuoy/releases) of sonobuoy, or build it yourself by running:
+```sh
+$ wget https://github.com/vmware-tanzu/sonobuoy/releases/download/v0.57.2/sonobuoy_0.57.2_linux_amd64.tar.gz
+$ tar -zxvf ./sonobuoy_0.57.2_linux_amd64.tar.gz
+```
+
+2. Run sonobuoy:
+```sh
+$ sudo ./sonobuoy run \
+    --mode certified-conformance \
+    --kubeconfig /var/snap/microk8s/current/credentials/client.config \
+    --plugin-env=e2e.E2E_EXTRA_ARGS="--non-blocking-taints=node-role.kubernetes.io/controller --ginkgo.v"
+```
+
+3. Check the status:
+```sh
+$ sudo ./sonobuoy status --kubeconfig /var/snap/microk8s/current/credentials/client.config
+```
+
+4. Retrieve results and extract
+```sh
+$ sudo ./sonobuoy retrieve --kubeconfig /var/snap/microk8s/current/credentials/client.config
+```