**Describe the unexpected behaviour**
ClickHouse returns exception if you would try to read polygon dictionary via SELECT query.

**How to reproduce**
ClickHouse version 21.10


```
CREATE DICTIONARY polygon_dict (
    key Array(Array(Array(Array(Float64)))),
    name String,
    value UInt64
)
PRIMARY KEY key
LAYOUT(POLYGON())
SOURCE(CLICKHOUSE(table 'polygon_dict_src'))
LIFETIME(MIN 300 MAX 360);

CREATE TABLE polygon_dict_src
(
    `key` Array(Array(Array(Array(Float64)))),
    `name` String,
    `value` UInt64
)
ENGINE = Log
	
INSERT INTO polygon_dict_src SELECT [[[[1.1,2.1],[5,3],[6,4],[1,4]]]], 'some', 10;


CREATE DICTIONARY polygon_dict (
    key Array(Array(Array(Array(Float64)))),
    name String,
    value UInt64
)
PRIMARY KEY key
LAYOUT(POLYGON())
SOURCE(CLICKHOUSE(table 'polygon_dict_src'))
LIFETIME(MIN 300 MAX 360);

SELECT dictGet(polygon_dict, 'name', (2., 3.)) AS x

┌─x────┐
│ some │
└──────┘

SELECT *
FROM polygon_dict

0 rows in set. Elapsed: 0.008 sec.

Received exception from server (version 21.10.1):
Code: 1. DB::Exception: Received from localhost:9000. DB::Exception: Reading the dictionary is not allowed. (UNSUPPORTED_METHOD)
```


**Expected behavior**
It's allowed to read POLYGON dictionaries via SELECT query.

if (dict_struct.range_min || dict_struct.range_max)
        throw Exception(ErrorCodes::BAD_ARGUMENTS,
            "{}: elements range_min and range_max should be defined only "
            "for a dictionary of layout 'range_hashed'",
            name);
    const DictionaryLifetime dict_lifetime{config, config_prefix + ".lifetime"};
    const auto dict_id = StorageID::fromDictionaryConfig(config, config_prefix);
    if constexpr (std::is_same_v<PolygonDictionary, PolygonDictionaryIndexEach> || std::is_same_v<PolygonDictionary, PolygonDictionaryIndexCell>)
    {
        const auto & layout_prefix = config_prefix + ".layout";
        Poco::Util::AbstractConfiguration::Keys keys;
        config.keys(layout_prefix, keys);
        const auto & dict_prefix = layout_prefix + "." + keys.front();
        size_t max_depth = config.getUInt(dict_prefix + ".max_depth", PolygonDictionary::kMaxDepthDefault);
        size_t min_intersections = config.getUInt(dict_prefix + ".min_intersections", PolygonDictionary::kMinIntersectionsDefault);
        return std::make_unique<PolygonDictionary>(dict_id, dict_struct, std::move(source_ptr), dict_lifetime, input_type, point_type, min_intersections, max_depth);
    }
    else
        return std::make_unique<PolygonDictionary>(dict_id, dict_struct, std::move(source_ptr), dict_lifetime, input_type, point_type);
}
void registerDictionaryPolygon(DictionaryFactory & factory)
{
    factory.registerLayout("polygon_simple", createLayout<PolygonDictionarySimple>, true);
    factory.registerLayout("polygon_index_each", createLayout<PolygonDictionaryIndexEach>, true);
    factory.registerLayout("polygon_index_cell", createLayout<PolygonDictionaryIndexCell>, true);
    
    factory.registerLayout("polygon", createLayout<PolygonDictionaryIndexCell>, true);
}
}