Include platform details in some artifact filenames

Some artifacts are tied to a certain platform (e.g., Mingw, Rust, etc).

Sometimes knowing it at a glance could be useful (e.g., when reusing these artifacts outside tor-browser-build, e.g., to create a container for local incremental builds).

We could do that when updating the toolchains for the next ESR.

List of artifacts to fix:

• mingw-w64-clang -> switched to single package for both 32-bit and 64-bit
• Rust
• Binutils