gha: aks: Add snippets to create / delete aks clusters

Those will be shortly used as part of a newly added GitHub action for
testing k8s tests on Azure.

They've been created using the secrets we already have exposed as part
of our GitHub, and they follow a similar way to authenticate to Azure /
create an AKS cluster as done in the `/test-kata-deploy` action.

Signed-off-by: Fabiano Fidêncio <fabiano.fidencio@intel.com>

.github/workflows/create-aks.yaml

@@ -0,0 +1,32 @@
+name: CI | Create AKS cluster
+on:
+  workflow_call:
+    inputs:
+      name:
+        required: true
+        type: string
+
+jobs:
+  create-aks:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Download Azure CLI
+        run: |
+          curl -sL https://aka.ms/InstallAzureCLIDeb | sudo bash
+
+      - name: Log into the Azure account
+        run: |
+          az login \
+            --service-principal \
+            -u "${{ secrets.AZ_APPID }}" \
+            -p "${{ secrets.AZ_PASSWORD }}" \
+            --tenant "${{ secrets.AZ_TENANT_ID }}"
+
+      - name: Create AKS cluster
+        run: |
+          az aks create \
+            -g "kataCI" \
+            -n "${{ inputs.name }}" \
+            -s "Standard_D4s_v3" \
+            --node-count 1 \
+            --generate-ssh-keys

.github/workflows/delete-aks.yaml

@@ -0,0 +1,31 @@
+name: CI | Delete AKS cluster
+on:
+  workflow_call:
+    inputs:
+      name:
+        required: true
+        type: string
+
+jobs:
+  delete-aks:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Download Azure CLI
+        run: |
+          curl -sL https://aka.ms/InstallAzureCLIDeb | sudo bash
+
+      - name: Log into the Azure account
+        run: |
+          az login \
+            --service-principal \
+            -u "${{ secrets.AZ_APPID }}" \
+            -p "${{ secrets.AZ_PASSWORD }}" \
+            --tenant "${{ secrets.AZ_TENANT_ID }}"
+
+      - name: Delete AKS cluster
+        run: |
+          az aks delete \
+            -g "kataCI" \
+            -n "${{ inputs.name }}" \
+            --yes \
+            --no-wait