CE Backport: Fix unleash server side cannot return feature flags
What does this MR do?
This is a backport MR for https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/9532
What are the relevant issue numbers?
Related: https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/9532/diffs
Does this MR meet the acceptance criteria?
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Changelog entry added, if necessary -
Documentation created/updated via this MR -
Documentation reviewed by technical writer or follow-up review issue created -
Tests added for this feature/bug -
Tested in all supported browsers -
Conforms to the code review guidelines -
Conforms to the merge request performance guidelines -
Conforms to the style guides -
Conforms to the database guides -
Link to e2e tests MR added if this MR has Requires e2e tests label. See the Test Planning Process. -
Security reports checked/validated by reviewer
Edited by Shinya Maeda