Chery-pick tikv#17950 and tikv#19071 to raftstore-proxy-8.5#448

ti-chi-bot[bot] merged 2 commits intopingcap:raftstore-proxy-8.5pingcap/tidb-engine-ext:raftstore-proxy-8.5from

gengliqi:add-read-index-config-proxy-8.5gengliqi/tikv:add-read-index-config-proxy-8.5Copy head branch name to clipboard