feat(stream,agg): support array_agg for streaming mode

[stdrc]

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What's changed and what's your intention?

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Please explain IN DETAIL what the changes are in this PR and why they are needed:

• Summarize your change (mandatory)
• How does this PR work? Need a brief introduction for the changed logic (optional)
• Describe clearly one logical change and avoid lazy messages (optional)
• Describe any limitations of the current code (optional)

Checklist

• I have written necessary rustdoc comments
• I have added necessary unit tests and integration tests
• All checks passed in ./risedev check (or alias, ./risedev c)

Documentation

Types of user-facing changes

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• SQL commands, functions, and operators

Release note

• Support array_agg aggregation function

Refer to a related PR or issue link (optional)

#4657

[codecov]

Codecov Report

Merging #4895 (f0d47ef) into main (aa6aebd) will increase coverage by 0.19%.
The diff coverage is 83.40%.

@@            Coverage Diff             @@
##             main    #4895      +/-   ##
==========================================
+ Coverage   73.80%   74.00%   +0.19%     
==========================================
  Files         871      874       +3     
  Lines      131635   133069    +1434     
==========================================
+ Hits        97148    98472    +1324     
- Misses      34487    34597     +110     

Flag	Coverage Δ
rust	74.00% <83.40%> (+0.19%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/batch/src/executor/mod.rs	72.30% <ø> (ø)
src/batch/src/rpc/service/task_service.rs	0.00% <0.00%> (ø)
src/cmd_all/src/playground.rs	0.00% <0.00%> (ø)
src/common/src/util/mod.rs	0.00% <ø> (ø)
src/compute/src/rpc/service/stream_service.rs	0.00% <0.00%> (ø)
src/compute/src/server.rs	0.00% <0.00%> (ø)
src/connector/src/source/datagen/source/reader.rs	85.30% <ø> (-0.41%)	⬇️
src/expr/src/error.rs	25.00% <0.00%> (-15.00%)	⬇️
src/expr/src/expr/agg.rs	50.00% <0.00%> (ø)
src/expr/src/expr/expr_is_null.rs	90.21% <ø> (ø)
... and 101 more

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