ARROW-16183: [C++][FlightRPC] Support bundled UCX

[cyb70289]

No description provided.

[github-actions]

https://issues.apache.org/jira/browse/ARROW-16183

[lidavidm]

Thanks for doing this!

[cyb70289]

Turn this PR to draft to rebase on #12861

[kou]

Could you rebase on master so that we can use #12861 changes.

[cyb70289]

UCX is not enabled in CI. I tested this PR offline with building from source and setting ucx_DIR to pre-built binaries, both on Linux.

[kou]

+1

I confirmed this on my local Debian GNU/Linux sid machine.

[ursabot]

Benchmark runs are scheduled for baseline = ccfae42 and contender = 0653113. 0653113 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 ⬇️0.39% ⬆️0.0%] test-mac-arm
[Finished ⬇️0.71% ⬆️0.0%] ursa-i9-9960x
[Finished ⬇️1.18% ⬆️0.0%] ursa-thinkcentre-m75q
Buildkite builds:
[Finished] 06531131 ec2-t3-xlarge-us-east-2
[Finished] 06531131 test-mac-arm
[Finished] 06531131 ursa-i9-9960x
[Finished] 06531131 ursa-thinkcentre-m75q
[Finished] ccfae42b ec2-t3-xlarge-us-east-2
[Finished] ccfae42b test-mac-arm
[Finished] ccfae42b ursa-i9-9960x
[Finished] ccfae42b 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