Tests try to upload report to S3 when running locally

[alex-hunt-materialize]

External contributors are expected to run the tests with make test, but the tests try to upload results to S3. External contributors do not have credentials to write to the S3 bucket, so the tests should not try to write there when run by external contributors.

Failed to upload test command report to S3: AccessDenied: Access Denied
	status code: 403, request id: ZRXV0269S6VAEAAJ, host id: z9PT2L11ka1uhW0orTQ2maI/oLPLbjWoQfJjSaroAh9AVTeqLfJ1ATLSNls3/vvbYAfLf3LpJqQ=

Steps to reproduce

1. Export AWS credentials and region for a role/user that doesn't have write permission.
2. Run make test
3. See the errors in the logs.

Expected: The tests to run without trying to upload results to S3.
Actual: Failed attempts to upload the test command reports to S3.