Update environment variable name for amazonS3builder in integration (#2550)

[amrltqt]

Which issue does this PR close?

Closes #2550

Rationale for this change

Update the environment variables names injected in the integration pipeline to test AmazonS3 client. The objective is to avoid conflicts when testing real injection while testing AmazonS3Builder::from_env() function.

What changes are included in this PR?

Update the github workflow pipeline + integration tests to leverage new names.

Are there any user-facing changes?

No

[amrltqt]

@tustvold it seems that AWS_* are useful as an environment variable for the CI. At least to work with localstack.

I'm starting to think that anyway we will need those variable in the CI, so we can just reuse them as is for testing the environment.

What do you think about it?

[tustvold]

I'm not sure I follow what you mean, and the CI seems to currently be failing? Do you mean the environment variables are needed for the CLI bootstrap, if so you can set environment variables for specific steps

[amrltqt]

Yes, I understand that we need (at least) the key_id, the secret_key correctly setup for the CLI to execute aws --endpoint-url=http://localstack:4566 s3 mb s3://test-bucket.

But, it's seems to be not needed anymore after that. I'll try to setup environment by steps as you mention.

[amrltqt]

@tustvold it should be better now.
Sorry for not having put a draft tag on this PR at first 😅

[tustvold]

Thank you

[ursabot]

Benchmark runs are scheduled for baseline = 0771b01 and contender = 67579a1. 67579a1 is a master commit associated with this PR. Results will be available as each benchmark for each run completes.
Conbench compare runs links:
[Skipped ⚠️ Benchmarking of arrow-rs-commits is not supported on ec2-t3-xlarge-us-east-2] ec2-t3-xlarge-us-east-2
[Skipped ⚠️ Benchmarking of arrow-rs-commits is not supported on test-mac-arm] test-mac-arm
[Skipped ⚠️ Benchmarking of arrow-rs-commits is not supported on ursa-i9-9960x] ursa-i9-9960x
[Skipped ⚠️ Benchmarking of arrow-rs-commits is not supported on ursa-thinkcentre-m75q] ursa-thinkcentre-m75q
Buildkite builds:
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