fix(util):  improve coverage rate with removing no reference function

fix: remove/comment out unused code for more coverage

enh: redistribute vgroup

fear(stream): add log

fix(query):set correct column match info size.

enh: opt sys idx perf

fix(sync): fix coverity scan issues

fix(all): improve coverage rate

* chore(release): make get_os.sh works on mac

* chore(tools): update taos-tools

* chore: update taos-tools for 3.0

test: modify timeout for tmq poll

fix: wrong permissions of 'show variables' command

enh: remove obsolete codes for raw data row

fix: coverity issues

test: add keep expired cases

fix(all): fixed coverity scan problems for second submiting

enh: insert parser refactor