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.

{
    if (!shared->cluster_discovery)
        return;
    shared->cluster_discovery->start();
}
void Context::setClustersConfig(const ConfigurationPtr & config, bool enable_discovery, const String & config_name)
{
    std::lock_guard lock(shared->clusters_mutex);
    if (ConfigHelper::getBool(*config, "allow_experimental_cluster_discovery") && enable_discovery && !shared->cluster_discovery)
    {
        shared->cluster_discovery = std::make_unique<ClusterDiscovery>(*config, getGlobalContext());
    }
    
    if (shared->clusters && isSameConfiguration(*config, *shared->clusters_config, config_name))
        return;
    auto old_clusters_config = shared->clusters_config;
    shared->clusters_config = config;
    if (!shared->clusters)
        shared->clusters = std::make_shared<Clusters>(*shared->clusters_config, settings, getMacros(), config_name);
    else
        shared->clusters->updateClusters(*shared->clusters_config, settings, config_name, old_clusters_config);
}
void Context::setCluster(const String & cluster_name, const std::shared_ptr<Cluster> & cluster)
{
    std::lock_guard lock(shared->clusters_mutex);
    if (!shared->clusters)
        throw Exception("Clusters are not set", ErrorCodes::LOGICAL_ERROR);
    shared->clusters->setCluster(cluster_name, cluster);
}
void Context::initializeSystemLogs()