[Enhancements] recognize LoongArch architectures

Please add to the `NativeVariant.Cpu` class:

public static boolean isLoongArch() {
return OS_ARCH.getProperty().contains("loong");
}

and to the `PlatformPredicate` class:

public static final PlatformPredicate LINUX_LOONGARCH_64 = new PlatformPredicate(NativeVariant.Os.isDesktop() &&
NativeVariant.Os.isLinux() && NativeVariant.Cpu.isLoongArch() && NativeVariant.Cpu.is64());