Move prefer_rlib from binary to base compiler.

Moves the prefer_rlib property out from being exclusively a binary
property to one thats part of the base compiler properties. This
provides a little more control over the libstd linkage in our libraries.
Specifically, this enables a usecase where rust_ffi_shared needs to link
against libstd statically rather than dynamically.

Bug: 175121262
Test: New Soong tests pass.
Change-Id: If68014c684a75ba70e9d7dacbb01c7d360dc25a1