refactor(batch): Use futures-async-stream to implement StreamScan executor

[D2Lark]

Signed-off-by: d2lark lichengamoy@gmail.com

Implement StreamScanExecutor using Executor2 trait

PLEASE DO NOT LEAVE THIS EMPTY !!!

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 docs and comments
• I have added necessary unit tests and integration tests

Refer to a related PR or issue link (optional)

close #1944

[TennyZhuang]

LGTM

[TennyZhuang]

https://github.com/singularity-data/risingwave/actions/runs/2243726092

[codecov]

Codecov Report

Merging #2232 (b8aacae) into main (14f8192) will increase coverage by 0.00%.
The diff coverage is 0.00%.

@@           Coverage Diff           @@
##             main    #2232   +/-   ##
=======================================
  Coverage   71.10%   71.10%           
=======================================
  Files         657      657           
  Lines       83860    83855    -5     
=======================================
  Hits        59626    59626           
+ Misses      24234    24229    -5     

Flag	Coverage Δ
rust	71.10% <0.00%> (+<0.01%)	⬆️

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	60.46% <ø> (ø)
src/batch/src/executor2/mod.rs	100.00% <ø> (ø)
src/batch/src/executor2/stream_scan.rs	0.00% <0.00%> (ø)

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[TennyZhuang]

CI failed due to an unstable test and someone is working on fix it, please wait a moment.

[TennyZhuang]

Blocking by #2226

[TennyZhuang]

CI: https://github.com/singularity-data/risingwave/actions/runs/2244511049

[D2Lark]

CI: https://github.com/singularity-data/risingwave/actions/runs/2244511049

my bad？

[TennyZhuang]

CI: https://github.com/singularity-data/risingwave/actions/runs/2244511049

my bad？

seems not, I will investigate on it

[TennyZhuang]

(rerun) CI is running: https://github.com/singularity-data/risingwave/actions/runs/2244749127

[TennyZhuang]

Thanks!