add env var to test-redis-enterprise action

Author: ofekshenawa

.github/workflows/test-redis-enterprise.yml

@@ -47,6 +47,7 @@ jobs:
       - name: Test
         env:
           RE_CLUSTER: "1"
+          USE_PREBUILT_REDIS: "1"
         run: |
           go test \
           --ginkgo.skip-file="ring_test.go" \