feat: Add reusable workflow to deploy terraform module

.github/workflows/terraform-deploy.yaml

@@ -0,0 +1,62 @@
+name: Deploy Terraform module
+
+on:
+  workflow_call:
+    inputs:
+      working-directory:
+        description: The directory that stores the Terraform module.
+        required: false
+        type: string
+        default: ./terraform
+      model:
+        description: The model that the charm is deployed on.
+        required: false
+        type: string
+        default: kubeflow
+      channel:
+        description: The channel that the charm is deployed from.
+        required: false
+        type: string
+        default: latest/edge
+      workload-check:
+        description: If true, pass `-w` as an argument to juju-wait. This means it will wait for the unit to go to active. It defaults to false since most of kubeflow charms have other depenndencies required in order for them to be active.
+        required: false
+        type: boolean
+        default: false
+
+jobs:
+  deploy:
+    name: Deploy Terraform
+    runs-on: ubuntu-20.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Setup operator environment
+        uses: charmed-kubernetes/actions-operator@main
+        with:
+          provider: microk8s
+          channel: 1.29-strict/stable
+          microk8s-addons: "dns storage rbac metallb:10.64.140.43-10.64.140.49"
+          juju-channel: 3.4/stable
+          charmcraft-channel: latest/candidate
+      - name: Install dependencies
+        run: |
+          sudo snap install --classic terraform
+          sudo snap install --classic juju-wait
+      - name: Apply terraform
+        run: |
+          # echo '{"credential": "microk8s", "enable-vault": true, "enable-barbican": true, "enable-designate": true, "nameservers": "testing.github."}' > terraform.tfvars.json
+          cd ${{ inputs.working-directory }}
+          terraform init
+          terraform apply -var "channel=${{ inputs.channel }}" -var "model_name=${{ inputs.model }}" --auto-approve
+          if [ "${{ inputs.workload-check }}" = false ]; then
+            juju-wait -v -m ${{ inputs.model }} -t 3600
+          else
+            juju-wait -vw -m ${{ inputs.model }} -t 3600
+          fi
+
+      - name: Collect juju status
+        if: always()
+        run: |
+          juju status -m ${{ inputs.model }}
+          juju debug-log -m ${{ inputs.model }} --replay