`DataTypeFactory::get` locks a mutex inside shared a context, there was a case when many threads were locked inside it

https://pastila.nl/?0043b3e6/c557368f4cf0eb87a3c6f2cc162bc693

It is not clear which thread locked the mutex for a long time. However, it may be possible to lock less inside `DataTypeFactory::get`.
{
    auto lock = getLock();
    return shared->users_config;
}
void Context::setUser(const UUID & user_id_)
{
    auto lock = getLock();
    user_id = user_id_;
    access = getAccessControl().getContextAccess(
        user_id_,  {},  true, settings, current_database, client_info);
    auto user = access->getUser();
    current_roles = std::make_shared<std::vector<UUID>>(user->granted_roles.findGranted(user->default_roles));
    auto default_profile_info = access->getDefaultProfileInfo();
    settings_constraints_and_current_profiles = default_profile_info->getConstraintsAndProfileIDs();
    applySettingsChanges(default_profile_info->settings);
    if (!user->default_database.empty())
        setCurrentDatabase(user->default_database);
}
std::shared_ptr<const User> Context::getUser() const
{
    return getAccess()->getUser();
}
String Context::getUserName() const
{
    return getAccess()->getUserName();
}
std::optional<UUID> Context::getUserID() const