Is your feature request related to a problem or challenge? Please describe what you are trying to do.

Support S3 specific endpoint env var - AWS_ENDPOINT_URL_S3 (similar to how we support AWS_ENDPOINT_URL_STS).

Describe the solution you'd like

If AWS_ENDPOINT_URL_S3 is set, use that as S3 endpoint with highest precedence.

Describe alternatives you've considered

For now I am setting AWS_ENDPOINT_URL but this means I can't use separate endpoint for different services.