refactor(sync): pre snapshot

test: add asan case

refact: build sync heartbeat reply

refact: build sync heartbeat msg

test: add asan case

enh: adjust sync append entry reply

fix: fix tablemeta leak

fix: fix asan error of leaked memory of udfd

enh: adjust sync append entry msg

fix: null pointer passed as argument , which is declared to never be null

enh: adjust request vote msg

refact: adjust timeout msg build

refact: adjust timeout msg build

test: check asan available