chore(aws): update to aws example in cloud integrations

[pranav-new-relic]

This PR comprises changes made to the AWS integration example to adapt to the new AWS provider (5.0.0)
Two major changes -

1. The block s3_configuration is now expected to be a nested block within the block http_endpoint_configuration, as per the updated documentation of the aws_kinesis_firehose_delivery_stream resource.
2. The attributes buffer_size and buffer_interval have been renamed to buffering_size and buffering_interval.

[codecov-commenter]

Codecov Report

Merging #2380 (b8dc1ac) into main (a1c810d) will not change coverage.
The diff coverage is n/a.

❗ Current head b8dc1ac differs from pull request most recent head 9089619. Consider uploading reports for the commit 9089619 to get more accurate results

@@           Coverage Diff           @@
##             main    #2380   +/-   ##
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  Coverage   33.97%   33.97%           
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  Files          91       91           
  Lines       24753    24753           
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  Hits         8409     8409           
  Misses      16192    16192           
  Partials      152      152           

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[pranav-new-relic]

FYI: These changes have been validated; all specified resources are found to have been created successfully.