Add GroupNode and parallelize TableFunctionProcessorNode 2

[Cpaulyz]

Description

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This PR has:

• been self-reviewed.
  • concurrent read
  • concurrent write
  • concurrent read and write
• added documentation for new or modified features or behaviors.
• added Javadocs for most classes and all non-trivial methods.
• added or updated version, license, or notice information
• added comments explaining the "why" and the intent of the code wherever would not be obvious
  for an unfamiliar reader.
• added unit tests or modified existing tests to cover new code paths, ensuring the threshold
  for code coverage.
• added integration tests.
• been tested in a test IoTDB cluster.

---

Key changed/added classes (or packages if there are too many classes) in this PR

[sonarqubecloud]

Quality Gate passed

Issues
16 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
3.3% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

Attention: Patch coverage is 44.00786% with 285 lines in your changes missing coverage. Please review.

Project coverage is 39.35%. Comparing base (db614fb) to head (c3c3e39).

Files with missing lines	Patch %	Lines
...f/builtin/relational/tvf/SessionTableFunction.java	0.00%	53 Missing ⚠️
...nal/planner/optimizations/ParallelizeGrouping.java	56.66%	52 Missing ⚠️
...builtin/relational/tvf/VariationTableFunction.java	0.00%	51 Missing ⚠️
.../builtin/relational/tvf/CapacityTableFunction.java	0.00%	39 Missing ⚠️
...ngine/plan/planner/plan/node/PlanGraphPrinter.java	0.00%	13 Missing ⚠️
...engine/plan/relational/planner/node/GroupNode.java	38.09%	13 Missing ⚠️
...nner/distribute/TableDistributedPlanGenerator.java	89.52%	11 Missing ⚠️
...ptimizations/TransformAggregationToStreamable.java	25.00%	9 Missing ⚠️
.../builtin/relational/TableBuiltinTableFunction.java	0.00%	9 Missing ⚠️
...erator/process/function/TableFunctionOperator.java	0.00%	7 Missing ⚠️
... and 9 more

Additional details and impacted files

@@            Coverage Diff             @@
##             master   #15136    +/-   ##
==========================================
  Coverage     39.34%   39.35%            
  Complexity      193      193            
==========================================
  Files          4598     4604     +6     
  Lines        295862   296322   +460     
  Branches      36883    36933    +50     
==========================================
+ Hits         116421   116612   +191     
- Misses       179441   179710   +269     

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