fix: rustls aws-lc-rs/ring compatibility by disabling default features

Don't require rustls default features which pulls in aws-lc-rs directly and prevents applications using amqprs from using ring instead. The dev-dependencies do depend on aws-lc-rs since they call its initialization function. Fixes #166 <!-- This is an auto-generated comment: release notes by coderabbit.ai --> ## Summary by CodeRabbit - **Chores** - Updated dependency settings to disable default features for certain TLS-related libraries. - Enabled an additional feature for a development dependency. <!-- end of auto-generated comment: release notes by coderabbit.ai -->