MINOR: [C++] Bump arrow-testing to include repro file for #41044

[felipecrv]

What changes are included in this PR?

Bump arrow-testing to include the latest commit.

[kou]

Could you also add this to run CI for C++?

diff --git a/.github/workflows/cpp.yml b/.github/workflows/cpp.yml
index 1d10be3b5b..f9de0c245b 100644
--- a/.github/workflows/cpp.yml
+++ b/.github/workflows/cpp.yml
@@ -21,6 +21,7 @@ on:
   push:
     paths:
       - '.github/workflows/cpp.yml'
+      - '.gitmodules'
       - 'ci/docker/**'
       - 'ci/scripts/cpp_*'
       - 'ci/scripts/install_azurite.sh'
@@ -34,6 +35,7 @@ on:
   pull_request:
     paths:
       - '.github/workflows/cpp.yml'
+      - '.gitmodules'
       - 'ci/docker/**'
       - 'ci/scripts/cpp_*'
       - 'ci/scripts/install_azurite.sh'

[kou]

Ah, it will not detect testing change... This?

diff --git a/.github/workflows/cpp.yml b/.github/workflows/cpp.yml
index 1d10be3b5b..dd5abbe1b4 100644
--- a/.github/workflows/cpp.yml
+++ b/.github/workflows/cpp.yml
@@ -31,6 +31,7 @@ on:
       - 'cpp/**'
       - 'docker-compose.yml'
       - 'format/Flight.proto'
+      - 'testing'
   pull_request:
     paths:
       - '.github/workflows/cpp.yml'
@@ -44,6 +45,7 @@ on:
       - 'cpp/**'
       - 'docker-compose.yml'
       - 'format/Flight.proto'
+      - 'testing'
 
 concurrency:
   group: ${{ github.repository }}-${{ github.head_ref || github.sha }}-${{ github.workflow }}

[felipecrv]

Done.

[pitrou]

Thanks @felipecrv !

[conbench-apache-arrow]

After merging your PR, Conbench analyzed the 4 benchmarking runs that have been run so far on merge-commit b3b4521.

There were no benchmark performance regressions. 🎉

The full Conbench report has more details. It also includes information about 7 possible false positives for unstable benchmarks that are known to sometimes produce them.