Zoekt Backend for multiple matches in a single file with master fix

What does this MR do and why?

This MR is the cherry-picked of this MR: Zoekt Backend for multiple matches in a single ... (!155984 - merged) with the added fix for the master broken. The reason for the master failure is explained here gitlab-org/quality/quality-engineering/team-tasks#2849 (comment 1990808137)

Related: #450736 (closed)

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