Decrease amount of ElasticIndexer sidekiq jobs

Now we are creating more ElasticIndexer jobs than we actually need. This is because we need to specify the exact list of the fields which should trigger indexer https://gitlab.com/gitlab-org/gitlab-ee/blob/9a2bb170aece2da5c2087f54159106bfa2886c7a/lib/elastic/application_search.rb#L33-50 Now changing any fields will lead to create sidekiq job, even when we don't actually store that field in ES.

@jnijhof @yorickpeterse

We are sorting by updated_at all entities, this is why we actually need to update all that items in ES.

Status changed to closed