fix(query): check the ts before merge file block.

fix: default #time series to 2 if schema's gone

feat: add database option 'table_prefix' and 'table_suffix'

fix: user with sysinfo=0 query ins_database.precision error

refactor(tmq)

* chore: move few tests items out

* fix: add taos as dep to tmq_demo

* chore: remove tests/test and tests/tsim

* chore: move few tests items out

* fix: add taos as dep to tmq_demo

enh: add hash prefix and suffix option to db

fix:hash obj reuse after free

fix(stream):min max function error

enh: show precision of db if user no sysinfo privilege

* feat: update taos-tools f169c0f for 3.0

* feat: update taos-tools a4d9b92 for 3.0

feat(stream): support delete data

fix: rlock for meta uid index querying from query related threads