Refactor cc/rust to prep for Rust stubs

This CL largely handles this refactoring in preparation for Rust stubs
support.

Rust modules need to be able to communicate stubs information to cc, and
certain bits of cc needs to be exported so rust can reuse them.

A new VersionedLinkableInterface is added to capture most of the
stubs-related interface definitions.

Bug: 203478530
Test: m blueprint_tests
Change-Id: I380225402fa85a3c39e7b18deb657054b3a52fbe