Bump gitlab-elasticsearch-indexer to 5.5.0

What does this MR do and why?

This MR bumps the gitlab-elasticsearch-indexer version used by gitlab

5.5.0 changes

References

• chore(release): version 5.5.0 (gitlab-elasticsearch-indexer!587 - merged)

Screenshots or screen recordings

How to set up and validate locally

we use specs to validate this

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