**How to reproduce**
Clickhouse server 20.13.1.5273
```
CREATE TABLE default.test
(
`key` UInt32,
`ts` DateTime CODEC(DoubleDelta, LZ4),
`db_time` DateTime DEFAULT now() COMMENT 'spout-ignore' CODEC(DoubleDelta, LZ4)
)
ENGINE = MergeTree
PARTITION BY toStartOfTenMinutes(db_time)
ORDER BY (key, ts)
TTL db_time + toIntervalHour(3)
SETTINGS index_granularity = 8192, merge_with_ttl_timeout = 3600, min_rows_for_compact_part = 1000000, min_bytes_for_compact_part = 200000000, in_memory_parts_enable_wal = 0;


INSERT INTO test(key, ts) SELECT number % 1000, now() + intDiv(number,1000) FROM numbers(500);

SELECT * FROM test;
500 rows in set. Elapsed: 0.003 sec.

DETACH TABLE test;

ATTACH TABLE test;

SELECT * FROM test;

0 rows in set. Elapsed: 0.002 sec.
```

**Expected behavior**
Clickhouse would flush parts on disk.
size_t getTotalMergesWithTTLInMergeList() const;
    using WriteAheadLogPtr = std::shared_ptr<MergeTreeWriteAheadLog>;
    WriteAheadLogPtr getWriteAheadLog();
    MergeTreeDataFormatVersion format_version;
    
    const MergingParams merging_params;
    bool is_custom_partitioned = false;
    
    Int64 minmax_idx_date_column_pos = -1; 
    Int64 minmax_idx_time_column_pos = -1; 
    
    static ExpressionActionsPtr getMinMaxExpr(const KeyDescription & partition_key, const ExpressionActionsSettings & settings);
    
    static Names getMinMaxColumnsNames(const KeyDescription & partition_key);
    
    static DataTypes getMinMaxColumnsTypes(const KeyDescription & partition_key);
    ExpressionActionsPtr getPrimaryKeyAndSkipIndicesExpression(const StorageMetadataPtr & metadata_snapshot) const;
    ExpressionActionsPtr getSortingKeyAndSkipIndicesExpression(const StorageMetadataPtr & metadata_snapshot) const;
    
    
    CompressionCodecPtr getCompressionCodecForPart(size_t part_size_compressed, const IMergeTreeDataPart::TTLInfos & ttl_infos, time_t current_time) const;
    std::lock_guard<std::mutex> getQueryIdSetLock() const { return std::lock_guard<std::mutex>(query_id_set_mutex); }
    
    
    bool insertQueryIdOrThrow(const String & query_id, size_t max_queries) const;
    bool insertQueryIdOrThrowNoLock(const String & query_id, size_t max_queries, const std::lock_guard<std::mutex> &) const;