Add S3 Batch Operations 2.0 Schema Fields to S3BatchJob/S3BatchJobTask

[lyoung-confluent]

This PR adds support for the new S3 Batch Job 2.0 Invocation Schema by adding the userArguments field and the s3Bucket key (instead of s3BucketArn) to the existing S3BatchJob and S3BatchJobTask structs. For more details see this blog post: https://aws.amazon.com/blogs/storage/automate-object-processing-in-amazon-s3-directory-buckets-with-s3-batch-operations-and-aws-lambda/

I'm unsure if this should be a new struct specifically for 2.0 or just a small modification to the existing struct as implemented in this PR. Lambda Powertools for Python has implemented it as the same object/class for both schema versions but also has the benefit of Python's looser typing: aws-powertools/powertools-lambda-python#3572

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[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (58da2cc) 73.30% compared to head (51690ab) 73.30%.

Additional details and impacted files

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  Coverage   73.30%   73.30%           
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  Files          26       26           
  Lines        1487     1487           
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  Hits         1090     1090           
  Misses        324      324           
  Partials       73       73           

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[bmoffatt]

I'm unsure if this should be a new struct specifically for 2.0 or just a small modification to the existing struct as implemented in this PR.

Since the new schema version removes a field, rather than being purely additive, let's do new structs with a V2 suffix.

[lyoung-confluent]

@bmoffatt I've split it into a new struct S3BatchJobV2, however the response struct has not changed with 2.0, should I duplicate it anyway?

[bmoffatt]

@bmoffatt I've split it into a new struct S3BatchJobV2, however the response struct has not changed with 2.0, should I duplicate it anyway?

I'd say leave the response struct as-is