**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 getRolesInfo()->enabled_roles;
}
std::shared_ptr<const EnabledRolesInfo> Context::getRolesInfo() const
{
    return getAccess()->getRolesInfo();
}
void Context::calculateAccessRights()
{
    auto lock = getLock();
    if (user_id)
        access = getAccessControlManager().getContextAccess(
            *user_id,
            current_roles ? *current_roles : std::vector<UUID>{},
             false,
            settings,
            current_database,
            client_info);
}
template <typename... Args>
void Context::checkAccessImpl(const Args &... args) const
{
    return getAccess()->checkAccess(args...);
}
void Context::checkAccess(const AccessFlags & flags) const { return checkAccessImpl(flags); }
void Context::checkAccess(const AccessFlags & flags, const std::string_view & database) const { return checkAccessImpl(flags, database); }
void Context::checkAccess(const AccessFlags & flags, const std::string_view & database, const std::string_view & table) const { return checkAccessImpl(flags, database, table); }
void Context::checkAccess(const AccessFlags & flags, const std::string_view & database, const std::string_view & table, const std::string_view & column) const { return checkAccessImpl(flags, database, table, column); }
void Context::checkAccess(const AccessFlags & flags, const std::string_view & database, const std::string_view & table, const std::vector<std::string_view> & columns) const { return checkAccessImpl(flags, database, table, columns); }