Bump CI image for zoekt
What does this MR do and why?
Why
This came about because local tests failed in an MR I was working on but passed in CI. My gdk was set to use the same zoekt version as production. Related discussion: !175474 (comment 2272540108)
What
This MR updates the zoekt image used in CI. The new image has the versions of Zoekt and gitlab-zoekt-indexer so they match what is running in production.
Specs were failing after the update. Zoekt now includes newlines in the Lines field in response response (see https://github.com/sourcegraph/zoekt/pull/747/files), so I removed \n from the join
References
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MR acceptance checklist
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Screenshots or screen recordings
N/A
How to set up and validate locally
Hopefully all the CI passes