Feature/td 6129

TD-12010: allocate enough buffer to accomodate tag data when get table meta from mnode

[TS-836]<feature>: getLong return a timestamp with good precision

[TD-11544][Enhancement] compatibility between old version client and new version server

[td-11899]STMT use now as timestamp cause "Timestamp out of range" error

* [TD-11517]<test>: add test case for python connector

* [TD-11634]<fix>: make tests and examples code compatible with python2

* [TD-11517]<test>: fix error in python examples test case

* [TD-11958]<test>: fix CI error for C# taosdemo test case

* chore: no changes for go connector

* chore: fix C# taosdemo binary path

* allocate enough buffer to accomodate tag data when get table meta from mnode

* accumulate affected rows count
Co-authored-by: Nshenglian zhou <slzhou@taosdata.com>

fix error, there is a core dump if tag equals a long num in where condition like where tag=99999999999999999999

[TS-816]<fix>: query cannot stop in windows

Test/td 10700 d

[TS-863]fix oem version installclient scripts

[TS-863]fix oem version makeclient_xx.sh

fix error, there is a core dump if tag equals a long num in where condition like where tag=99999999999999999999

TD-11623: improve schemaless insert performance