feat(taos-ws-py): support stmt2 in python websocket connector

[menshibin]

Description

function： Websocket support stmt2

Jira: https://jira.taosdata.com:18080/browse/TS-6489)

Checklist

Please check the items in the checklist if applicable.

• Is the user manual updated?
• Are the test cases passed and automated?
• Is there no significant decrease in test coverage?

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.37%. Comparing base (c8bb43d) to head (8a1374c).
⚠️ Report is 89 commits behind head on 3.0.

Additional details and impacted files

@@            Coverage Diff             @@
##              3.0     #327      +/-   ##
==========================================
- Coverage   84.41%   81.37%   -3.05%     
==========================================
  Files          24       24              
  Lines        3453     3522      +69     
==========================================
- Hits         2915     2866      -49     
- Misses        538      656     +118     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.