Cleanup workflows and pin action versions (#118)

This change does some cleanup of the actions workflows to makes them
faster to run and easier to debug. It pins all of the actions workflows
to specific commit hashes. Dependabot will be enabled in a separate PR
to manage updates.

Signed-off-by: Philip Laine <philip.laine@gmail.com>

.github/workflows/helm.yaml

@@ -0,0 +1,49 @@
+name: helm
+on:
+  pull_request:
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Clone the code
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd #v6.0.2
+      - name: Lint Helm Chart
+        run: helm lint ./helm/kubernetes-operator
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Clone the code
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd #v6.0.2
+      - name: Setup Go
+        uses: actions/setup-go@4b73464bb391d4059bd26b0524d20df3927bd417 #v6.3.0
+        with:
+          go-version-file: go.mod
+      - name: Install the latest version of kind
+        run: |
+          curl -Lo ./kind https://kind.sigs.k8s.io/dl/latest/kind-linux-amd64
+          chmod +x ./kind
+          sudo mv ./kind /usr/local/bin/kind
+      - name: Verify kind installation
+        run: kind version
+      - name: Create kind cluster
+        run: kind create cluster
+      - name: Prepare operator
+        run: |
+          make docker-build IMG=netbirdio/kubernetes-operator:debug
+          kind load docker-image netbirdio/kubernetes-operator:debug
+      - name: Install cert-manager via Helm
+        run: |
+          helm repo add jetstack https://charts.jetstack.io
+          helm repo update
+          helm install cert-manager jetstack/cert-manager --namespace cert-manager --create-namespace --set installCRDs=true
+      - name: Wait for cert-manager to be ready
+        run: |
+          kubectl wait --namespace cert-manager --for=condition=available --timeout=300s deployment/cert-manager
+          kubectl wait --namespace cert-manager --for=condition=available --timeout=300s deployment/cert-manager-cainjector
+          kubectl wait --namespace cert-manager --for=condition=available --timeout=300s deployment/cert-manager-webhook
+      - name: Install Helm chart for project
+        run: |
+          helm install test-chart --create-namespace --namespace netbird --set 'operator.image.tag=debug' ./helm/kubernetes-operator
+      - name: Check Helm release status
+        run: |
+          helm status test-chart --namespace netbird