Merge branch 'bump-elasticsearch-indexer-to-v1-4-0' into 'master'

Bump GITLAB_ELASTICSEARCH_INDEXER_VERSION=v1.4.0

Closes #33255 and gitlab-elasticsearch-indexer#39

See merge request gitlab-org/gitlab!18558

GITLAB_ELASTICSEARCH_INDEXER_VERSION

-1.3.0
+1.4.0

changelogs/unreleased/bump-elasticsearch-indexer-to-v1-4-0.yml

+---
+title: Bump GITLAB_ELASTICSEARCH_INDEXER_VERSION=v1.4.0
+merge_request: 18558
+author:
+type: fixed