fix integ test cleanup (#956)

## Overview
* Integ test stacks aren't getting cleaned up.
* Fixing issue.

## Testing

Author: jchrostek-dd

.gitlab/templates/pipeline.yaml.tpl

@@ -431,6 +431,7 @@ integration-cleanup-stacks:
     - curl -fsSL https://deb.nodesource.com/setup_20.x | bash -
     - apt-get install -y nodejs
     - cd integration-tests
+    - npm ci
   {{ end }}
   script:
     - echo "Destroying CDK stacks with identifier ${IDENTIFIER}..."