fix: Update AwsException constructor to accept Throwable instead of Exception

[zishang520]

Overview

This PR updates the AwsException constructor to accept a Throwable instead of an Exception as the $previous parameter. This change ensures that all types of throwable errors, including Error and Exception, are properly handled and passed to the AwsException.

Changes

• Updated the AwsException constructor to accept \Throwable for the $previous parameter.
• Ensured compatibility with all existing error handling mechanisms in the AWS SDK.

Why this change?

Previously, the AwsException constructor only accepted Exception as the $previous parameter, which caused issues when other types of throwables, like Error, were passed. By accepting Throwable, we ensure a more robust and flexible error handling process.

Testing

• Tested with various throwable types to confirm that the error handling behaves as expected.
• No breaking changes observed in the current error-handling workflow.

Impact

This change enhances the SDK's error-handling capabilities without introducing breaking changes, ensuring better compatibility with a wider range of PHP error types.