Add ConditionalSignatureBuilder

Aimed at resolving !2141 (diffs)

We now need even more options to handle queue priorities.

With this function, we can write:

sycl::property_list makeQueuePropertyList(bool inOrder, bool enableProfiling) {
    auto builder = gmx::ConditionalSignatureBuilder();
    return builder.addIf(inOrder, sycl::property::queue::in_order())
            .addIf(enableProfiling, sycl::property::queue::enable_profiling())
            .build<sycl::property_list>()
}

instead of

sycl::property_list makeQueuePropertyList(bool inOrder, bool enableProfiling) {
    if (enableProfiling)
    {
        if (inOrder)
        {
            return { sycl::property::queue::in_order(), sycl::property::queue::enable_profiling() };
        }
        else
        {
            return { sycl::property::queue::enable_profiling() };
        }
    }
    else
    {
        if (inOrder)
        {
            return { sycl::property::queue::in_order() };
        }
        else
        {
            return {};
        }
    }
}