Remove deprecated sum_with_overflow APIs

[PointKernel]

Description

This PR removes the deprecated SUM_WITH_OVERFLOW, make_sum_with_overflow_aggregation(), and Java sumWithOverflow() compatibility APIs.

Checklist

• I am familiar with the Contributing Guidelines.
• New or existing tests cover these changes.
• The documentation is up to date with these changes.

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[PointKernel]

/ok to test fa8bc43

[PointKernel]

/ok to test aff809c

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

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📥 Commits

Reviewing files that changed from the base of the PR and between d466e60 and aff809c.

📒 Files selected for processing (6)

• cpp/include/cudf/aggregation.hpp
• cpp/src/aggregation/aggregation.cpp
• java/src/main/java/ai/rapids/cudf/Aggregation.java
• java/src/main/java/ai/rapids/cudf/GroupByAggregation.java
• java/src/main/java/ai/rapids/cudf/ReductionAggregation.java
• java/src/test/java/ai/rapids/cudf/ReductionTest.java

💤 Files with no reviewable changes (5)

• java/src/main/java/ai/rapids/cudf/GroupByAggregation.java
• java/src/main/java/ai/rapids/cudf/Aggregation.java
• java/src/test/java/ai/rapids/cudf/ReductionTest.java
• java/src/main/java/ai/rapids/cudf/ReductionAggregation.java
• cpp/src/aggregation/aggregation.cpp

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📝 Walkthrough

Summary by CodeRabbit

• Breaking Changes
  • Removed deprecated sumWithOverflow aggregation APIs and enum aliases across C++ and Java interfaces.
  • Use the supported sumOverflow aggregation APIs instead.
• Tests
  • Removed coverage for the retired sumWithOverflow alias.

Walkthrough

Removes deprecated sum-with-overflow aliases from the C++ and Java aggregation APIs, including the C++ enum and factory exports, Java factory methods, and the corresponding reduction alias test.

Changes

Sum-overflow alias removal

Layer / File(s)	Summary
C++ API and export removal cpp/include/cudf/aggregation.hpp, cpp/src/aggregation/aggregation.cpp	Removes the deprecated SUM_WITH_OVERFLOW enum alias and make_sum_with_overflow_aggregation() declarations, implementation, and exported instantiations.
Java API and test cleanup java/src/main/java/ai/rapids/cudf/{Aggregation,GroupByAggregation,ReductionAggregation}.java, java/src/test/java/ai/rapids/cudf/ReductionTest.java	Removes deprecated sumWithOverflow() factories and the test covering the reduction alias.

Estimated code review effort: 2 (Simple) | ~10 minutes

Possibly related PRs

• rapidsai/cudf#23014: Earlier renaming and deprecation work introduced the SUM_OVERFLOW API while retaining these deprecated aliases.

Suggested labels: 3 - Ready for Review

Suggested reviewers: mhaseeb123, bdice, davidwendt

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately summarizes the removal of deprecated sum-with-overflow APIs.
Description check	✅ Passed	The description matches the changes by naming the deprecated C++ and Java compatibility APIs removed.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[PointKernel]

/merge