Adds source dataType for aggregation

[noob-se7en]

Instructions:

1. The PR has to be tagged with at least one of the following labels (*):
   1. feature
   2. bugfix
   3. performance
   4. ui
   5. backward-incompat
   6. release-notes (**)
2. Remove these instructions before publishing the PR.

(*) Other labels to consider:

• testing
• dependencies
• docker
• kubernetes
• observability
• security
• code-style
• extension-point
• refactor
• cleanup

(**) Use release-notes label for scenarios like:

• New configuration options
• Deprecation of configurations
• Signature changes to public methods/interfaces
• New plugins added or old plugins removed

[codecov-commenter]

Codecov Report

❌ Patch coverage is 47.96748% with 64 lines in your changes missing coverage. Please review.
✅ Project coverage is 63.46%. Comparing base (9286da2) to head (89f6a40).
⚠️ Report is 52 commits behind head on master.

Files with missing lines	Patch %	Lines
...t/local/aggregator/MinMaxRangeValueAggregator.java	0.00%	21 Missing ⚠️
...t/segment/local/aggregator/AvgValueAggregator.java	0.00%	19 Missing ⚠️
.../local/aggregator/SumPrecisionValueAggregator.java	35.71%	6 Missing and 3 partials ⚠️
...segment/local/aggregator/ValueAggregatorUtils.java	16.66%	4 Missing and 1 partial ⚠️
...local/indexsegment/mutable/MutableSegmentImpl.java	91.66%	3 Missing ⚠️
...segment/local/aggregator/CountValueAggregator.java	0.00%	1 Missing and 1 partial ⚠️
...t/segment/local/aggregator/MaxValueAggregator.java	60.00%	1 Missing and 1 partial ⚠️
...t/segment/local/aggregator/MinValueAggregator.java	60.00%	1 Missing and 1 partial ⚠️
...inot/segment/local/aggregator/ValueAggregator.java	66.66%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #16868      +/-   ##
============================================
+ Coverage     63.38%   63.46%   +0.07%     
- Complexity     1399     1410      +11     
============================================
  Files          3055     3064       +9     
  Lines        178920   180064    +1144     
  Branches      27421    27544     +123     
============================================
+ Hits         113414   114281     +867     
- Misses        56769    56986     +217     
- Partials       8737     8797      +60     

Flag	Coverage Δ
custom-integration1	100.00% <ø> (ø)
integration	100.00% <ø> (ø)
integration1	100.00% <ø> (ø)
integration2	0.00% <ø> (ø)
java-11	63.43% <47.96%> (+0.07%)	⬆️
java-21	63.44% <47.96%> (+0.09%)	⬆️
temurin	63.46% <47.96%> (+0.07%)	⬆️
unittests	63.46% <47.96%> (+0.07%)	⬆️
unittests1	56.33% <22.76%> (-0.02%)	⬇️
unittests2	33.57% <41.46%> (+0.18%)	⬆️

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[noob-se7en]

@Jackie-Jiang added intermediate field spec in schema:

Like:

  "intermediateFieldSpecs": [
    {
      "name": "random",
      "dataType": "STRING"
    }
  ],