Merge changes I0caddbf6,Iee20b060,I6c92580b,I45028945,Ia7dd5220, ... into main

* changes:
  rust: Resolve crate roots outside rust-project
  rust: Cache crateRootPath to avoid ctx
  rust: internalize srcPathFromModuleSrcs
  rust: move crateRootPath to compiler
  rust: Privatize Cargo* methods on compiler
  rust: Move compiler interface to compiler.go