ARROW-17489: [R] Nightly builds failing due to test referencing unrelease stringr functions - #13937

Not sure whether the best solution here is to bump the stringr version, or remove this test entirely for the moment?

https://issues.apache.org/jira/browse/ARROW-17489

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

LGTM. Thanks! 🙏🏻

Benchmark runs are scheduled for baseline = 6d8624b and contender = 510eb6f. 510eb6f 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
[Failed ⬇️0.24% ⬆️0.0%] test-mac-arm
[Failed ⬇️0.27% ⬆️0.0%] ursa-i9-9960x
[Finished ⬇️0.92% ⬆️0.0%] ursa-thinkcentre-m75q
Buildkite builds:
[Finished] 510eb6fa ec2-t3-xlarge-us-east-2
[Finished] 510eb6fa test-mac-arm
[Failed] 510eb6fa ursa-i9-9960x
[Finished] 510eb6fa ursa-thinkcentre-m75q
[Finished] 6d8624b0 ec2-t3-xlarge-us-east-2
[Failed] 6d8624b0 test-mac-arm
[Failed] 6d8624b0 ursa-i9-9960x
[Finished] 6d8624b0 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