test: improve docs example for go connector

for 2.6

[TD-14141]

fix:  resolve arithmetic issues of first/last/last_row with keepColumnName enabled.

fix(query): V26 tsdb read merge block and memory condition check is not right

fix: fix a typo

* fix: remove csudo from mkdir debug

* fix: remove more csudo from directory maniplation

* fix: packaging/release.sh for 2.6

fix(query): V26 filter condition filterRmUnitRange can not reset unitIdx

fix(query): filter condition filterRmUnitRange can not reset unitIdx pointer when unitNum==0 [TS-1498]

* fix: remove csudo from mkdir debug

* fix: remove more csudo from directory maniplation

* feat: update taos-tools for 2.6

prepare for 3.0

[TD-13052]

* feat: update taos-tools

fix -I -s

for 2.6

* feat: taosdump support new format prepare for 3.0

for 2.6 branch

update taos-tools

[TD-13052]

fix(query): percentile second scan not call cause crash

docs: typo in LineProtocolExample.java