add one big install deps block

Author: Mladen Rusev

.github/workflows/tests.yaml

@@ -87,19 +87,14 @@ jobs:
         with:
           project_id: machineidentitysecurity-jsci-e
 
-      - name: Install gke-gcloud-auth-plugin
+      - name: Install dependencies
         run: |
           gcloud components install gke-gcloud-auth-plugin
-
-      - name: Install Venafi venctl CLI
-        run: |
           curl -sSfL https://dl.venafi.cloud/venctl/latest/installer.sh | bash
           echo "/home/runner/.venafi/bin" >> $GITHUB_PATH    
-
-      - name: Install Smallstep CLI (step)
-        run: |
           curl -LO https://github.com/smallstep/cli/releases/latest/download/step-cli_amd64.deb
           sudo apt-get install ./step-cli_amd64.deb
+          helm plugin install https://github.com/databus23/helm-diff
 
       - id: go-version
         run: |