FILES() command doesn't work with AWS SSO credentials

[matthinea]

Steps to reproduce:

1. Use aws sso login to get AWS credentials
2. Run aws configure export-credentials --profile default
3. Query an S3 location that your credentials should have access to using the FILES() DSL and the AccessKeyId and SecretAccessKey printed by step 2 as the aws.s3.access_key and aws.s3.secret_key, respectively.

Expected behavior

Either of the following:

1. The credentials produced by aws sso login should work.
2. The error message should be more informative.

Real behavior

ERROR 1064 (HY000): Access storage error. Error code: null. Error message: null. 

In debugging this, I was able to eventually gain access to the S3 file via another pair of credentials, supplied by the AWS web console via IAM > Users. I think the issue is that aws sso login produces a session token that usually must accompany the access key and secret.

Supporting a session_token would be a nice feature, but otherwise, a better error message would be helpful, as well as a note in the docs that the credentials produced via SSO won't work.

StarRocks version:

3.3.5-6d81f75