Refactor TableSession and TableSessionPool of Python client

[HTHou]

Description

As title

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 39.62%. Comparing base (b34b714) to head (255a6b1).
Report is 5 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master   #14232   +/-   ##
=========================================
  Coverage     39.62%   39.62%           
  Complexity       71       71           
=========================================
  Files          4242     4242           
  Lines        270437   270437           
  Branches      32792    32792           
=========================================
+ Hits         107165   107171    +6     
+ Misses       163272   163266    -6     

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