[TD-2720][TD-2247][TD-1024]<test>: add test case

Fix description about VNode mem cache.

Update connector-java-ch.md

[TD-2795]taosd crash when executing interval query

[TD-2788] <fix>: fix two telemetryReporting options in taos.cfg.

[TD-2775] <docs>: update faq regarding UPDATE parameter.

[TD-2784]<test>test pr from forked repo

[TD-2741][TD-2736]<test>add timeout in jenkins

Hotfix/sangshuduo/td 2769 nodejs 12+ adapt

Feature/td 2776

[TD-2671]<fix>:support create/drop/alter stable

[TD-2719]trace subquery states