InfoRefsUploadPack disk cache
This introduces a new caching feature for the SmartHTTP RPC InfoRefsUploadPack. This feature flagged addition will cache specific classes of requests to the RPC in the hopes of performance improvements.
Part of #1631 (closed)
Prerequisites: !1305 (merged), !1362 (merged), !1268 (merged), and !1373 (merged)
Original iteration: !1255 (closed)
Edited by GitLab Release Tools Bot