Duplicate File awsSdkSigV4AConfigSelector.d.ts breaking deployments

### Checkboxes for prior research

- [X] I've gone through [Developer Guide](https://docs.aws.amazon.com/sdk-for-javascript/v3/developer-guide) and [API reference](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest)
- [X] I've checked [AWS Forums](https://forums.aws.amazon.com) and [StackOverflow](https://stackoverflow.com/questions/tagged/aws-sdk-js).
- [X] I've searched for [previous similar issues](https://github.com/aws/aws-sdk-js-v3/issues) and didn't find any solution.

### Describe the bug

Our builds recently started failing when updating from 3.645.0 to 3.649.0, and we were able to trace it to duplicate `awsSdkSigV4AConfigSelector.d.ts` files. When I try to unzip our build zip file, I get this error. I'm guessing there's a case sensitivity issue.

### SDK version number

@aws-sdk/package-name@version, ...

### Which JavaScript Runtime is this issue in?

Node.js

### Details of the browser/Node.js/ReactNative version

v20.12.1

### Reproduction Steps

We're using azure with github actions so it's a little hard to provide repro instructions. Hoping the bug description is enough.

### Observed Behavior

Our logs showed

>Run From Package Initialization failed. Zip Contains 2 duplicate files with identical name in the same path

It was only when trying to unzip that we could see that the issue came from the aws package.

### Expected Behavior

zip-based builds to succeed. No duplicate files.

### Possible Solution

_No response_

### Additional Information/Context

_No response_

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