[IOTDB-6327] Random choosing available nodes to send sql requests

[JackieTien97]

more details can be seen in https://apache-iotdb.feishu.cn/docx/FVh3djW9boALTaxVRwqcUGVznLd

[codecov]

Codecov Report

Attention: Patch coverage is 23.33333% with 23 lines in your changes are missing coverage. Please review.

Project coverage is 43.52%. Comparing base (0df3700) to head (5ad8be3).
Report is 11 commits behind head on master.

Files	Patch %	Lines
...n/java/org/apache/iotdb/session/NodesSupplier.java	0.00%	8 Missing ⚠️
...rc/main/java/org/apache/iotdb/session/Session.java	36.36%	7 Missing ⚠️
...ava/org/apache/iotdb/session/RoundRobinPolicy.java	28.57%	5 Missing ⚠️
...a/org/apache/iotdb/session/DummyNodesSupplier.java	25.00%	3 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #12511      +/-   ##
============================================
+ Coverage     43.44%   43.52%   +0.08%     
  Complexity       69       69              
============================================
  Files          3110     3117       +7     
  Lines        193287   193992     +705     
  Branches      23018    23144     +126     
============================================
+ Hits          83970    84441     +471     
- Misses       109317   109551     +234     

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[VGalaxies]

If both enableRedirection and enableQueryRedirection are set to false, this will cause an NPE since endPointToSessionConnection has not been initialized.

[JackieTien97]

fixed

[sonarcloud]

Quality Gate failed

Failed conditions
0.0% Coverage on New Code (required ≥ 80%)
B Reliability Rating on New Code (required ≥ A)

See analysis details on SonarCloud

Catch issues before they fail your Quality Gate with our IDE extension SonarLint

[CritasWang]

LGTM