Investigate high memory consumption of Git related endpoints

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Summary

Some Git-related controller actions (like TreeController and BlobController) are allocating more than 1GB` memory: https://nonprod-log.gitlab.net/app/r/s/rFTXv

The issue is not manifested in the production logs: https://log.gprd.gitlab.net/app/r/s/RzsTg

Related issue: gitlab-com/gl-infra/delivery#19847 (closed)