[TD-3897]timestamp not work with now filter

[TD-3907]filter timestamp

[TD-3795]cq crash issue

[TD-3805]CQ time issue

[TD-3836]taosd crashes for top query

* [TD-3580]<fix>: taosdump support human readable time format.

support -S too.

* [TD-3580]<fix>: taosdump support human readable time format.

provide more info about time format
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

[TD-3909]<fix>: [http/race] fix singleCmd race issue

* [TD-3906]<fix>: taosdemo back to 4 INT columns.

* [TD-3906]<fix>: taosdemo back to 4 columns.

test case need change correspondingly.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

disable failed test

[TD-3883]<fix>: [http/clear parser] clear parser when decode finished to fix race with next request

Feature/qrefactor

Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

Feature/qrefactor

* [TD-3880]<fix>: C# driver test miss unsigned type.

* [TD-3880]<fix>: C# driver test miss unsigned type.

also modify other files as what  TD-3204 did.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

[TD-3856]<test> add case for TD-3856

[TD-3789]<test> add case for TD-3789, and fix util.sql

[TD-3871]fix timestamp issue

* [TD-3877]<fix>: C# query result determination mechanism changed.

* [TD-3877]<fix>: C# query result determination mechanism changed.

change taosdemo and C#checker.
Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

[TD-3872]<fix>: fix taosGetDiskSize statvfs input directory bug