v8.5.4: tidb: change the default value of `tidb_mpp_store_fail_ttl` (#20668)#21047

ti-chi-bot[bot] merged 3 commits intopingcap:feature/preview-v8.5.4pingcap/docs-cn:feature/preview-v8.5.4from

ti-chi-bot:cherry-pick-20668-to-release-8.5ti-chi-bot/docs-cn:cherry-pick-20668-to-release-8.5Copy head branch name to clipboard