ci: update workflow-template

Add build cache and disable push cache for kaniko

- Add `--cache=true` to enable build cache
- Add `--cache-dir=/workspace/cache` to specify cache
  directory
- Add `--no-push-cache` to disable push cache

Author: in-jun

chart/templates/app/ci/workflow-template.yaml

@@ -103,7 +103,9 @@ spec:
         args:
           - "--context=/workspace/source"
           - "--dockerfile=/workspace/source/Dockerfile"
+          - "--cache=true"
           - "--cache-dir=/workspace/cache"
+          - "--no-push-cache"
           - "--cleanup"
           - "--destination=harbor.injunweb.com/injunweb/{{ $.Values.project }}-{{ $app.name }}:{{`{{inputs.parameters.sha}}`}}"
           - "--destination=harbor.injunweb.com/injunweb/{{ $.Values.project }}-{{ $app.name }}:latest"