[BUG] LocalStack requires authentication, breaking Kinesis integration tests

[andrross]

Describe the bug

As of March 23, 2026, LocalStack consolidated their community and pro Docker images into a single image that requires authentication. The localstack/localstack GitHub repository has been archived.

#20967 is a short-term fix to unblock the failing builds

Possible Options

1. Set up authenticated access with a LocalStack account
2. Replace LocalStack with an alternative

[harshavamsi]

@andrross https://github.com/hectorvent/floci -- came across this over the weekend, might be worth looking into?