enhance: map multi row groups into one cache cell

[sparknack]

issue: #45486

Introduce row group batching to reduce cache cell granularity and improve
memory&disk efficiency. Previously, each parquet row group mapped 1:1 to a cache
cell. Now, up to kRowGroupsPerCell (4) row groups are merged into one cell.

This reduces the number of cache cells (and associated overhead) by ~4x while
maintaining the same data granularity for loading.

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: sparknack
To complete the pull request process, please assign jiaoew1991 after the PR has been reviewed.
You can assign the PR to them by writing /assign @jiaoew1991 in a comment when ready.

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

• internal/core/OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[sre-ci-robot]

[ci-v2-notice]
Notice: We are gradually rolling out the new ci-v2 system.

• Legacy CI jobs remain unaffected, you can just ignore ci-v2 if you don't want to run it.
• Additional "ci-v2/*" checkers will run for this PR to ensure the new ci-v2 system is working as expected.
• For tests that exist in both v1 and v2, passing in either system is considered PASS.

To rerun ci-v2 checks, comment with:

• /ci-rerun-code-check // for ci-v2/code-check
• /ci-rerun-build // for ci-v2/build
• /ci-rerun-ut-integration // for ci-v2/ut-integration
• /ci-rerun-ut-go // for ci-v2/ut-go
• /ci-rerun-ut-cpp // for ci-v2/ut-cpp
• /ci-rerun-ut // for all ci-v2/ut-integration, ci-v2/ut-go, ci-v2/ut-cpp
• /ci-rerun-e2e-arm // for ci-v2/e2e-arm [master branch only]
• /ci-rerun-e2e-default // for ci-v2/e2e-default [master branch only]

If you have any questions or requests, please contact @zhikunyao.

[codecov]

Codecov Report

❌ Patch coverage is 61.90476% with 88 lines in your changes missing coverage. Please review.
✅ Project coverage is 75.93%. Comparing base (224a794) to head (356b73e).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
...re/storagev2translator/ManifestGroupTranslator.cpp	0.00%	84 Missing ⚠️
...gcore/storagev2translator/GroupChunkTranslator.cpp	97.43%	2 Missing ⚠️
...core/storagev2translator/ManifestGroupTranslator.h	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #46249      +/-   ##
==========================================
- Coverage   75.93%   75.93%   -0.01%     
==========================================
  Files        1898     1898              
  Lines      297301   297412     +111     
==========================================
+ Hits       225757   225834      +77     
- Misses      64047    64085      +38     
+ Partials     7497     7493       -4     

Components	Coverage Δ
Client	78.18% <ø> (ø)
Core	82.79% <61.90%> (-0.03%)	⬇️
Go	73.89% <ø> (+<0.01%)	⬆️

Files with missing lines	Coverage Δ
...core/src/segcore/storagev2translator/GroupCTMeta.h	100.00% <100.00%> (ø)
...segcore/storagev2translator/GroupChunkTranslator.h	100.00% <100.00%> (ø)
...e/storagev2translator/GroupChunkTranslatorTest.cpp	99.55% <100.00%> (+0.06%)	⬆️
...gcore/storagev2translator/GroupChunkTranslator.cpp	97.81% <97.43%> (-0.05%)	⬇️
...core/storagev2translator/ManifestGroupTranslator.h	0.00% <0.00%> (ø)
...re/storagev2translator/ManifestGroupTranslator.cpp	0.00% <0.00%> (ø)

... and 23 files with indirect coverage changes

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.