MINOR: [C++] Fix compilation error in hash_join_benchmark

[js8544]

Rationale for this change

HashJoinImpl::Init expects output_batch_callback and finished_callback to return Status, while the currently passed arguments return void. It caused compilation errors on my machine.

error: cannot convert ‘arrow::compute::JoinBenchmark::JoinBenchmark(arrow::compute::BenchmarkSettings&)::<lambda(int64_t, arrow::compute::ExecBatch)>’ to ‘arrow::compute::HashJoinImpl::OutputBatchCallback’ {aka ‘std::function<arrow::Status(long int, arrow::compute::ExecBatch)>’}

What changes are included in this PR?

Fix the return types.

Are these changes tested?

Yes. It fixes the compilation error on my machine.

Are there any user-facing changes?

No.

[js8544]

The expected return type was changed from void to Status in #15253 last week. Not sure why our CI process didn't catch this compile error.

[kou]

+1

We need additional -DARROW_BUILD_OPENMP_BENCHMARKS=ON option to build this benchmark. Our CI jobs don't cover it.

[ursabot]

Benchmark runs are scheduled for baseline = b0e1037 and contender = 899146b. 899146b is a master commit associated with this PR. Results will be available as each benchmark for each run completes.
Conbench compare runs links:
[Finished ⬇️0.0% ⬆️0.0%] ec2-t3-xlarge-us-east-2
[Finished ⬇️0.15% ⬆️0.0%] test-mac-arm
[Finished ⬇️0.26% ⬆️0.0%] ursa-i9-9960x
[Finished ⬇️0.63% ⬆️0.03%] ursa-thinkcentre-m75q
Buildkite builds:
[Finished] 899146bb ec2-t3-xlarge-us-east-2
[Finished] 899146bb test-mac-arm
[Finished] 899146bb ursa-i9-9960x
[Finished] 899146bb ursa-thinkcentre-m75q
[Finished] b0e10379 ec2-t3-xlarge-us-east-2
[Finished] b0e10379 test-mac-arm
[Finished] b0e10379 ursa-i9-9960x
[Finished] b0e10379 ursa-thinkcentre-m75q
Supported benchmarks:
ec2-t3-xlarge-us-east-2: Supported benchmark langs: Python, R. Runs only benchmarks with cloud = True
test-mac-arm: Supported benchmark langs: C++, Python, R
ursa-i9-9960x: Supported benchmark langs: Python, R, JavaScript
ursa-thinkcentre-m75q: Supported benchmark langs: C++, Java