I have ClickHouse server running in virtual environment that reports the following warning:

```
# clickhouse-client
ClickHouse client version 22.7.2.15 (official build).
Connecting to localhost:9000 as user default.
Connected to ClickHouse server version 22.7.2 revision 54457.

Warnings:
 * Linux is not using a fast TSC clock source. Performance can be degraded. Check /sys/devices/system/clocksource/clocksource0/current_clocksource

# cat /sys/devices/system/clocksource/clocksource0/current_clocksource
kvm-clock
```

It looks like a false positive as kvm-clock is considered a preferable clock source for kvm-based VMs.
https://opensource.com/article/17/6/timekeeping-linux-vms

Regardless of whether it's a bug or not, I'd like to have some mechanism that allows to disable particular warnings. There are may be other questionable warnings in the future.

{
    auto lock = getLock();
    return user_id;
}
void Context::setQuotaKey(String quota_key_)
{
    auto lock = getLock();
    client_info.quota_key = std::move(quota_key_);
}
void Context::setCurrentRoles(const std::vector<UUID> & current_roles_)
{
    auto lock = getLock();
    if (current_roles ? (*current_roles == current_roles_) : current_roles_.empty())
       return;
    current_roles = std::make_shared<std::vector<UUID>>(current_roles_);
    calculateAccessRights();
}
void Context::setCurrentRolesDefault()
{
    auto user = getUser();
    setCurrentRoles(user->granted_roles.findGranted(user->default_roles));
}
boost::container::flat_set<UUID> Context::getCurrentRoles() const
{
    return getRolesInfo()->current_roles;
}
boost::container::flat_set<UUID> Context::getEnabledRoles() const