AWS/S3 - Configuration for `request_checksum_calculation` / `response_checksum_validation`?

**Which part is this question about**
API / Documentation

**Describe your question**
Is there a configuration equivalent for `request_checksum_calculation` - https://docs.aws.amazon.com/cli/v1/userguide/cli-configure-envvars.html#envvars-list-AWS_REQUEST_CHECKSUM_CALCULATION.

**Additional context**

Start with the AWS CLI documentation linked in the issue and inspect the crate's existing S3 configuration surface. Determine whether equivalent configuration exists for request checksum calculation or response checksum validation, and document the supported setting or the absence of one; no specific file or test is named.

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