GH-41720: [C++][Acero] Remove an useless parameter for QueryContext::…

…Init called in hash_join_benchmark (#41716)

### Rationale for this change
My local compilation parameters will include the compilation of some basic benchmarks. I discovered this compilation problem today. It seems that #41334 of `QueryContext::Init` is not synchronized to `hash_join_benchmark.cc`, and CI has not found this problem. .

### What changes are included in this PR?
Remove the first arg .

### Are these changes tested?
Needn't

### Are there any user-facing changes?
No

* GitHub Issue: #41720

Lead-authored-by: ZhangHuiGui <2689496754@qq.com>
Co-authored-by: ZhangHuiGui <hugo.zhang@openpie.com>
Signed-off-by: Antoine Pitrou <antoine@python.org>

ci/scripts/cpp_build.sh

@@ -120,6 +120,7 @@ else
  -DARROW_BUILD_BENCHMARKS=${ARROW_BUILD_BENCHMARKS:-OFF} \
  -DARROW_BUILD_EXAMPLES=${ARROW_BUILD_EXAMPLES:-OFF} \
  -DARROW_BUILD_INTEGRATION=${ARROW_BUILD_INTEGRATION:-OFF} \
+ -DARROW_BUILD_OPENMP_BENCHMARKS=${ARROW_BUILD_OPENMP_BENCHMARKS:-OFF} \
  -DARROW_BUILD_SHARED=${ARROW_BUILD_SHARED:-ON} \
  -DARROW_BUILD_STATIC=${ARROW_BUILD_STATIC:-ON} \
  -DARROW_BUILD_TESTS=${ARROW_BUILD_TESTS:-OFF} \

cpp/src/arrow/acero/hash_join_benchmark.cc

@@ -148,7 +148,7 @@ class JoinBenchmark {
  };
 
  scheduler_ = TaskScheduler::Make();
- DCHECK_OK(ctx_.Init(settings.num_threads, nullptr));
+ DCHECK_OK(ctx_.Init(nullptr));
 
  auto register_task_group_callback = [&](std::function<Status(size_t, int64_t)> task,
  std::function<Status(size_t)> cont) {

docker-compose.yml

@@ -286,6 +286,7 @@ services:
  <<: [*common, *ccache, *sccache, *cpp]
  ARROW_BUILD_BENCHMARKS: "ON"
  ARROW_BUILD_EXAMPLES: "ON"
+ ARROW_BUILD_OPENMP_BENCHMARKS: "ON"
  ARROW_ENABLE_TIMING_TESTS: # inherit
  ARROW_EXTRA_ERROR_CONTEXT: "ON"
  ARROW_MIMALLOC: "ON"