Update GitLab Elasticsearch Indexer

What does this MR do?

Updates gitlab-elasticsearch-indexer to a version that forwards on the correlation-id set in ee/lib/gitlab/elastic/indexer.rb

See gitlab-elasticsearch-indexer!70 (merged) for more details of what's included.

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content