fix: set response code when RPC connect error

fix: taos crash since error code not set and taosd crash when first connect error timer frees rpm msg then retry timer

fix: select _block_dist() from t; set the unit of Size to KB

* fix: taosdump escape dbname for 2.6

* fix: json for escape char for 2.6

* fix: update taostools ffc2e6f for 2.6

fix: remove db name tolower in connection

fix: support INTERP with boolean type

fix: query cancel crash issue

avoid race condition

* fix: taosbenchmark childtbl from/to for 2.6

* fix: taosbenchmark create tables from to for 2.6

* fix: taosbenchmark disorder range dynamic

* fix: update taos-tools

* fix: taosbenchmark multithreads with limit for 2.6

* fix: update taos-tools

* fix: 5-taos-tools/taosbenchmark/taosdemoTestInsertWithJsonSml.py

* fix: taos-tools tag mechanism

* fix: tools/makepkg.sh

fix: insert memory leak

fix:export taos_schemaless_insert_raw for windows lib

* fix: taosbenchmark support same min/max for 2.6

* fix: update to 2.4.11

* fix: taosdump free tbname in loose mode for 2.6

* docs: add content about req-id

* docs: remove ws on version 2.6

fix: check begin_thread return error