ARROW-18205: [C++] Substrait consumer is not converting right side references correctly on joins

[vibhatha]

This PR includes modification to the existing join key conversion logic and updated test cases.

[github-actions]

https://issues.apache.org/jira/browse/ARROW-18205

[github-actions]

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

[vibhatha]

cc @westonpace appreciate your review.

[westonpace]

I don't think we really have any tests with nested references as the join key so this is all theoretical but I think the understanding of indices is slightly off.

[westonpace]

Thanks for the quick fix.

[ursabot]

Benchmark runs are scheduled for baseline = 4755e0f and contender = e1303aa. e1303aa 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 ⬇️0.0% ⬆️0.0%] test-mac-arm
[Finished ⬇️0.0% ⬆️0.0%] ursa-i9-9960x
[Finished ⬇️0.04% ⬆️0.04%] ursa-thinkcentre-m75q
Buildkite builds:
[Finished] e1303aac ec2-t3-xlarge-us-east-2
[Failed] e1303aac test-mac-arm
[Finished] e1303aac ursa-i9-9960x
[Finished] e1303aac ursa-thinkcentre-m75q
[Finished] 4755e0f2 ec2-t3-xlarge-us-east-2
[Failed] 4755e0f2 test-mac-arm
[Finished] 4755e0f2 ursa-i9-9960x
[Finished] 4755e0f2 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