Routing is missing for group wiki search

What does this MR do and why?

It was sending only count_only options that's why ids were empty here: https://gitlab.com/gitlab-org/gitlab/-/blob/8d8d0e216f761b715f37ce8085869f687afcae8b/ee/lib/elastic/latest/wiki_class_proxy.rb#L37 and thus the routing was empty

Screenshots or screen recordings

Project search

Before	After

Group search

Before	After

How to set up and validate locally

1. Ensure elasticsearch is enabled
2. Perform a Group Wiki search. Verify that in the es query in the performance bar, you see the routing param
3. Perform a Project Wiki search. Verify that in the es query in the performance bar, you see the routing param

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #430812 (closed)