[zenny-atomic] update port for later vcpkg versions

[luncliff]

Changes

• use vcpkg-cmake host dependency
• use vcpkg_install_copyright

References

• https://github.com/zenny-chen/simple-stdatomic-for-VS-Clang

Triplet Support

• x64-windows
• arm64-windows
• x64-uwp

Configuration

"vcpkg-configuration.json" changes for the release.

{
    "registries": [
        {
            "kind": "git",
            "repository": "https://github.com/luncliff/vcpkg-registry",
            "packages": [
                "zenny-atomic"
            ],
            "baseline": "..."
        }
    ]
}