add helmfile binary installation to setup-tools action

- Add helmfile v0.170.0 installation to composite action
- Include helmfile in tool caching for performance
- Enable helmfile installation in helm-install-test job
- Ensures helm-install task can execute helmfile sync commands
- Pinned version for reproducible builds

Author: adamancini

.github/actions/setup-tools/action.yml

@@ -1,5 +1,5 @@
 name: 'Setup Common Tools'
-description: 'Setup Helm, Task, yq, kubectl, preflight, and Replicated CLI'
+description: 'Setup Helm, Task, yq, kubectl, preflight, helmfile, and Replicated CLI'
 inputs:
   helm-version:
     description: 'Helm version'
@@ -16,6 +16,9 @@ inputs:
   install-preflight:
     description: 'Whether to install preflight'
     default: 'false'
+  install-helmfile:
+    description: 'Whether to install helmfile'
+    default: 'false'
 
 runs:
   using: 'composite'
@@ -43,7 +46,8 @@ runs:
         path: |
           /usr/local/bin/yq
           /usr/local/bin/preflight
-        key: tools-${{ runner.os }}-yq-v4.44.3-preflight-v0.95.0
+          /usr/local/bin/helmfile
+        key: tools-${{ runner.os }}-yq-v4.44.3-preflight-v0.95.0-helmfile-v0.170.0
 
     - name: Install yq
       shell: bash
@@ -68,6 +72,19 @@ runs:
           echo "preflight already installed (cached)"
         fi
     
+    - name: Install helmfile
+      if: inputs.install-helmfile == 'true'
+      shell: bash
+      run: |
+        if [ ! -f /usr/local/bin/helmfile ]; then
+          echo "Installing helmfile v0.170.0..."
+          curl -L https://github.com/helmfile/helmfile/releases/download/v0.170.0/helmfile_0.170.0_linux_amd64.tar.gz | tar xz
+          sudo mv helmfile /usr/local/bin/
+          sudo chmod +x /usr/local/bin/helmfile
+        else
+          echo "helmfile already installed (cached)"
+        fi
+    
     - name: Install Replicated CLI
       shell: bash
       working-directory: ${{ inputs.app-dir }}

.github/workflows/wg-easy-pr-validation.yaml

@@ -246,6 +246,7 @@ jobs:
         uses: ./.github/actions/setup-tools
         with:
           helm-version: ${{ env.HELM_VERSION }}
+          install-helmfile: 'true'
 
       - name: Helm registry login
         if: needs.create-customer-and-cluster.outputs.skip-customer-registry == 'false'