[FR]: Provide the AWS CLI 'from source' so it can be used without Rosetta on Apple Silicon

### What is the current behavior?

`rules_aws` uses the packaged distribution for the AWS CLI, which requires Rosetta on Apple silicon, see https://github.com/aws/aws-cli/issues/7252 for more information.

### Describe the feature

Provide the AWS CLI as a `py_binary` target, rather than a `native_binary` so that it can be used on Apple Silicon without the need for Rosetta.

Start by locating the rules_aws target that packages the AWS CLI and compare its current native_binary definition with the requested py_binary approach. Verify that the resulting AWS CLI target builds and can run on Apple Silicon without Rosetta; the issue provides no specific test file, so inspect the repository's existing target checks.

Written by the indexing model from the issue text.