Merge branch 'feature/szhou/csum-sample-mavg' of github.com:taosdata/TDengine into feature/szhou/csum-sample-mavg

[TD-6645/enhance]: Minor modification to OpenTSDB writing protocol parsing

Docs/update latest feature

[TD-6515]<test>: add and modify testcases for insert/openTsdbTelnetLinesInsert.py

[TD-6586]<test>: add 1 testcase for TD-6586:Binary type value return None with python connector

to defaultJSONType, as this param will also be used to set JSON tags
default string types.

* [TS-352]<fix>taosdemo support unsigned data type

* support negative number

* change snprintf back to strncpy

* fix bug

* extend data value

add function in util/common.py

Comment out schemalessInsert temporarily

[TD-5229]<fix>: Fix a small-probability bug

modify dockerManifest.sh

[TD-6634]<hotfix>:use original string and remove begin/end quote instead of string value after stringRmQuote

* [TD-6479]<fix>: taosdump cmdline align for database sequence.

adopt 'taosdump -D db1,db2,...' format.

* fix core dump issue.

[TS-366]<test>: update valgrind suppressions file to ignore some python errors

Feature/td 5992 set configure once

td-5925

[TD-6638]<fix>: OpenTSDB telnet line tags should be separated using whitespace not comma