Enable windows rocm build of whisper.cpp

Add ROCm support and CI improvements

ci: automate library bundling in ROCm build workflow

Replace manual copying of ROCm libraries and shared objects with an automated CMake-based bundling step using GET_RUNTIME_DEPENDENCIES. This ensures all linked libraries (e.g., libamdhip64, librocm_sysdeps) are recursively detected and bundled into build/bin, filtering out system libs like libc.so, while improving portability and reducing maintenance for dependency management.

build: enhance library bundling to handle symlinks for portable distribution

- Updated CMake script to resolve and copy real targets of symlinks, then recreate symlinks in build dir
- Modified chmod to only affect real .so* files, ignoring symlinks
- Removed outdated comments and improved script clarity for better portability of whisper-cli binaries

Replaced file(CREATE_LINK): We now use execute_process(COMMAND ln -sf ...) which is standard on Linux

Changing Bundle Linked Libraries to use linux based ldd instead of cmake, I am trying to make the smallest changes to whisper.cpp as possible without modifying existing things like cmake files or adding more files.

Author: Geramy