Add/use createDirectoriesIfAbsent method, robust against concurrent calls

[shahor02]

No description provided.

[ironMann]

Hi @shahor02, I would simplify this as:

std::filesystem::create_directories(path);
if (!std::filesystem::is_directory(path)) {
    throw std::runtime_error(fmt::format("Failed to create {} directory", path));
}

[shahor02]

Thanks, indeed, I see that it is not throwing on the existing directory! Changed to even shorter

if (!std::filesystem::create_directories(path) && !std::filesystem::is_directory(path)) {
   throw std::runtime_error(fmt::format("Failed to create {} directory", path));
}