[Elasticsearch] Camel cased words should be split into smaller tokens

If you have method like def requeuePendingConversion you should be able to find it by requeuePending It used to work, so it seems like a regression. I fixed it and we even have a spec for this https://gitlab.com/gitlab-org/gitlab-elasticsearch-git/blob/master/spec/main_spec.rb#L55

Should be investigated because it makes ES search not really useful.

I reproduced it for master

Edited May 19, 2022 by Coung Ngo