Add logging for files pulled from S3 + enable RIE debug for flaky test

[bentvelj]

Why is this change necessary?

Purposes of debugging the flaky golang test

tests/end_to_end/test_runtimes_e2e.py::TestHelloWorldZipPackagePermissionsEndToEnd_0_go1_x::test_hello_world_workflow

How does it address the issue?

Add logging for files pulled from S3, since this is a unique component of this test and there could be permission issues preventing the lambda from invoking properly.

Enable RIE debug environment variable to get more information

What side effects does this change have?

N/A

Mandatory Checklist

PRs will only be reviewed after checklist is complete

• Add input/output type hints to new functions/methods
• Write design document if needed (Do I need to write a design document?)
• Write/update unit tests
• Write/update integration tests
• Write/update functional tests if needed
• make pr passes
• make update-reproducible-reqs if dependencies were changed
• Write documentation

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.