ARROW-16993: [C++] Don't find Boost components if they aren't needed

[kou]

[github-actions[bot]]

https://issues.apache.org/jira/browse/ARROW-16993

[github-actions[bot]]

:warning: Ticket has not been started in JIRA, please click 'Start Progress'.

[kou]

+1

[ursabot]

Benchmark runs are scheduled for baseline = ee3a8d8a92e5d01c3c3846fb400c5c523c625642 and contender = 102b9bda2cf79bdbf8120dc67c687b796092ca87. 102b9bda2cf79bdbf8120dc67c687b796092ca87 is a master commit associated with this PR. Results will be available as each benchmark for each run completes. Conbench compare runs links: [Finished :arrow_down:0.0% :arrow_up:0.0%] ec2-t3-xlarge-us-east-2 [Failed :arrow_down:0.2% :arrow_up:0.0%] test-mac-arm [Failed :arrow_down:0.0% :arrow_up:0.0%] ursa-i9-9960x [Finished :arrow_down:0.6% :arrow_up:0.04%] ursa-thinkcentre-m75q Buildkite builds: [Finished] 102b9bda ec2-t3-xlarge-us-east-2 [Finished] 102b9bda test-mac-arm [Failed] 102b9bda ursa-i9-9960x [Finished] 102b9bda ursa-thinkcentre-m75q [Finished] ee3a8d8a ec2-t3-xlarge-us-east-2 [Failed] ee3a8d8a test-mac-arm [Failed] ee3a8d8a ursa-i9-9960x [Finished] ee3a8d8a 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

[ursabot]

['Python', 'R'] benchmarks have high level of regressions. ursa-i9-9960x