test：update count.py and add sysinfo.py into ci

fix: fix last row reader close memory issues

enh: add stream queue to vnode

enh: support alter debugflag in dnode

fix(test): fix test cases

test: add test case into ci

test: valgrind case

feat: the 'null' value for the user is of type 'varchar(0)'

fix: hanlde the error if propose failed

test: del nouse test case

enh: refactor client queue