Optimize the serialize method of intermedia result of aggregation

[Beyyes]

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.

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

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 88 lines in your changes missing coverage. Please review.

Project coverage is 39.84%. Comparing base (8bf2294) to head (e96f0af). Report is 16 commits behind head on master.

Files with missing lines	Patch %	Lines
.../operator/source/relational/aggregation/Utils.java	0.00%	41 Missing :warning:
...eryengine/plan/planner/TableOperatorGenerator.java	0.00%	15 Missing :warning:
...onal/aggregation/TableMaxMinByBaseAccumulator.java	0.00%	13 Missing :warning:
.../source/relational/aggregation/AvgAccumulator.java	0.00%	6 Missing :warning:
...ource/relational/aggregation/FirstAccumulator.java	0.00%	4 Missing :warning:
.../relational/TableAggregationTableScanOperator.java	0.00%	3 Missing :warning:
...rce/relational/aggregation/FirstByAccumulator.java	0.00%	2 Missing :warning:
...source/relational/aggregation/LastAccumulator.java	0.00%	2 Missing :warning:
...urce/relational/aggregation/LastByAccumulator.java	0.00%	2 Missing :warning:

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #13875      +/-   ##
============================================
+ Coverage     39.83%   39.84%   +0.01%     
  Complexity       71       71              
============================================
  Files          4153     4154       +1     
  Lines        262846   262839       -7     
  Branches      32005    32009       +4     
============================================
+ Hits         104692   104720      +28     
+ Misses       158154   158119      -35     

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[sonarqubecloud[bot]]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
1.0% Duplication on New Code

See analysis details on SonarCloud