**Describe the issue**
ClickHouse is unable to start up after upgrading from 20.8 to 21.8. 

There is a replicated table with `:` in zk path and it couldn't be loaded with:

`2021.09.15 03:49:58.435071 [ 633075 ] {} <Error> Application: DB::Exception: Unknown auxiliary ZooKeeper name '/test_prefix'. If it's required it can be added to the section <auxiliary_zookeepers> in config.xml: Cannot attach table `db1`.`table1` from metadata file /var/lib/clickhouse/metadata/db1/table1.sql from query ATTACH TABLE db1.table1 (`field1` String, `date` Date) ENGINE = ReplicatedMergeTree('/test_prefix:db1/{shard}/table1', '{replica}') PARTITION BY toMonth(date) PRIMARY KEY field1 ORDER BY field1 SETTINGS index_granularity = 8192: while loading database `db1` from path /var/lib/clickhouse/metadata/db1
`

**Expected behavior**
ClickHouse server is able to startup after upgrade without schema change. "test_prefix" in "/test_prefix:db1/{shard}/table1" is not interpreted as an auxiliary ZooKeeper name.

{
    return getAccess()->getQuota();
}
std::optional<QuotaUsage> Context::getQuotaUsage() const
{
    return getAccess()->getQuotaUsage();
}
void Context::setCurrentProfile(const String & profile_name)
{
    auto lock = getLock();
    try
    {
        UUID profile_id = getAccessControlManager().getID<SettingsProfile>(profile_name);
        setCurrentProfile(profile_id);
    }
    catch (Exception & e)
    {
        e.addMessage(", while trying to set settings profile {}", profile_name);
        throw;
    }
}
void Context::setCurrentProfile(const UUID & profile_id)
{
    auto lock = getLock();
    auto profile_info = getAccessControlManager().getSettingsProfileInfo(profile_id);
    checkSettingsConstraints(profile_info->settings);
    applySettingsChanges(profile_info->settings);
    settings_constraints_and_current_profiles = profile_info->getConstraintsAndProfileIDs(settings_constraints_and_current_profiles);
}
std::vector<UUID> Context::getCurrentProfiles() const