Cygwin: Experimental `coreutils`

### Description
Port and build binaries from `coreutils` MSYS2 package using `aarch64-pc-cygwin` cross-compilation toolchain.

### Acceptance Criteria
  - Native `coreutils` binaries can be built with `aarch64-pc-cygwin` cross-compilation toolchain on Linux outside of the MSYS2 build system.
  - Build and testing of `coreutils` has been integrated into `advanced.yml` workflow.