According to the following page, a primary key is used for both LIKE and NOT LIKE conditions:
https://clickhouse.com/docs/en/engines/table-engines/mergetree-family/mergetree/#functions-support

As I found, a primary key is not used for NOT LIKE 'prefix%' conditions, engine scans all granules.

**How to reproduce**
ClickHouse Playground:
https://fiddle.clickhouse.com/095384c8-7b7e-45ec-b7e7-42dc8150be89

```
CREATE TABLE data
(str String)
ENGINE=MergeTree
ORDER BY str;

INSERT INTO data (str)
SELECT 'aa' FROM numbers(100000);

INSERT INTO data (str)
SELECT 'ba' FROM numbers(100000);

INSERT INTO data (str)
SELECT 'ca' FROM numbers(100000);

SET send_logs_level='trace';

SELECT count()
FROM data
WHERE str NOT LIKE 'a%';
```

`(SelectExecutor): Selected 3/3 parts by partition key, 3 parts by primary key, 36/36 marks by primary key, 36 marks to read from 3 ranges`

**Additional context**
Primary key is used for LIKE conditions, engine skips granules:
https://fiddle.clickhouse.com/95dd14a6-2e9f-4c45-94cd-169233f2a702

Primary key is used for != conditions, engine skips granules:
https://fiddle.clickhouse.com/e208b937-20c3-4cc0-896b-bfe83b42454a

{
    String fixed_prefix;
    const char * pos = like_pattern.data();
    const char * end = pos + like_pattern.size();
    while (pos < end)
    {
        switch (*pos)
        {
            case '%':
                [[fallthrough]];
            case '_':
                return fixed_prefix;
            case '\\':
                ++pos;
                if (pos == end)
                    break;
                [[fallthrough]];
            default:
                fixed_prefix += *pos;
                break;
        }
        ++pos;
    }
    return fixed_prefix;
}
static String extractFixedPrefixFromRegularExpression(const String & regexp)