Update S3 model to use one created from Smithy's compileBddForAws transform (#4612)

~~The S3 Express canary has been failing with a DNS resolution error on
`ListObjectsV2[EXPRESS]`~~

~~This lines up with PR #4433 which replaced the S3 model's
endpointRuleSet with endpointBdd.~~

~~This branch swaps the S3 model back to the `endpointRuleSet` version
from
[aws-sdk-rust](https://github.com/awslabs/aws-sdk-rust/blob/main/aws-models/s3.json)
to bisect whether the BDD endpoint codegen is causing the failure or if
it's an infra issue.~~

~~**Do not merge** this is a test branch. Will invoke the canary against
it and report results.~~

@landonxjames edit: Used this PR to experiment with updated S3 models
that would pass. Created one with the Smithy `compileBddForAws`
transform introduced in smithy-lang/smithy#2953
and that succeeded on a manual canary run in
https://github.com/smithy-lang/smithy-rs/actions/runs/24868627805

---------

Co-authored-by: Landon James <lnj@amazon.com>

Author: vcjana