Refactor Compilation Logic to Support Multiple OS Independently

[wujunyi792]

What would you like to be added/modified:
Separate the logic for different operating systems into independent functions rather than implementing linux and windows compilation in a single function. Suggested approach:

function build_kubeedge_release() {
    case $OS in
    linux）
    build_kubeedge_release_linux
    ;;
    windows）
    build_kubeedge_release_windows
    ;; 
    *）
    echo "not support OS $OS"
    exit 1
    ;; 
    esac 

    exit 0
}

Why is this needed:
Combining the compilation for both Linux and Windows in one function can make future support for more OS variants (like windows-arm) challenging. Too many if branches can degrade code readability. By having dedicated functions for each OS, it simplifies the logic, enhances readability, and provides a more scalable approach for future OS support.