feat: Revise the RESTful bulk insert API

[bigsheeper]

Revise the RESTful bulk insert API from version 1 to version 2.

issue: #28521

[yellow-shine]

rerun ut

[mergify]

@bigsheeper E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[bigsheeper]

/run-cpu-e2e

[mergify]

@bigsheeper E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[mergify]

@bigsheeper E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[bigsheeper]

/run-cpu-e2e

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@bigsheeper E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[codecov]

Codecov Report

Attention: Patch coverage is 96.29630% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 81.12%. Comparing base (52540fe) to head (9198497).
Report is 7 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #29698      +/-   ##
==========================================
- Coverage   81.15%   81.12%   -0.03%     
==========================================
  Files         972      972              
  Lines      139862   139862              
==========================================
- Hits       113507   113468      -39     
- Misses      22587    22625      +38     
- Partials     3768     3769       +1     

Files	Coverage Δ
...nternal/distributed/proxy/httpserver/request_v2.go	100.00% <100.00%> (ø)
...nternal/distributed/proxy/httpserver/handler_v2.go	89.58% <95.65%> (-0.13%)	⬇️

... and 15 files with indirect coverage changes

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@bigsheeper E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[mergify]

@bigsheeper ut workflow job failed, comment rerun ut can trigger the job again.

[mergify]

@bigsheeper E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[mergify]

@bigsheeper ut workflow job failed, comment rerun ut can trigger the job again.

[PowderLi]

/LGTM

[czs007]

/approve

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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