`toUnixTimestamp64*()` functions treat milli-, micro- and nanoseconds in a wrong way when timestamp is negative, for example:

```sql
SELECT toUnixTimestamp64Milli(toDateTime64('1927-01-01 00:00:00', 0, 'Europe/Zurich'))

┌─toUnixTimestamp64Milli(toDateTime64('1927-01-01 00:00:00', 0, 'Europe/Zurich'))─┐
│                                                                  -1357002000000 │
└─────────────────────────────────────────────────────────────────────────────────┘


SELECT toUnixTimestamp64Milli(toDateTime64('1927-01-01 00:00:00.123', 3, 'Europe/Zurich'))

┌─toUnixTimestamp64Milli(toDateTime64('1927-01-01 00:00:00.123', 3, 'Europe/Zurich'))─┐
│                                                                      -1357002000123 │
└─────────────────────────────────────────────────────────────────────────────────────┘
```
(In the case above, the first timestamp must be less than the second)

Comparison doesn't work properly either:

```sql
SELECT toDateTime64('1969-12-12 12:12:12.13', 2) > toDateTime64('1969-12-12 12:12:12.12', 2)

┌─greater(toDateTime64('1969-12-12 12:12:12.13', 2), toDateTime64('1969-12-12 12:12:12.12', 2))─┐
│                                                                                             0 │
└───────────────────────────────────────────────────────────────────────────────────────────────┘

SELECT toDateTime64('1979-12-12 12:12:12.13', 2) > toDateTime64('1979-12-12 12:12:12.12', 2)

┌─greater(toDateTime64('1979-12-12 12:12:12.13', 2), toDateTime64('1979-12-12 12:12:12.12', 2))─┐
│                                                                                             1 │
└───────────────────────────────────────────────────────────────────────────────────────────────┘
```

ClickHouse version 22.2.2.1
{
    
    const char * s = buf.position();
    
    static constexpr auto DateTimeStringInputSize = 19;
    
    static constexpr auto DateStringInputSize = 10;
    bool optimistic_path_for_date_time_input = s + DateTimeStringInputSize <= buf.buffer().end();
    if (optimistic_path_for_date_time_input)
    {
        if (s[4] < '0' || s[4] > '9')
        {
            UInt16 year = (s[0] - '0') * 1000 + (s[1] - '0') * 100 + (s[2] - '0') * 10 + (s[3] - '0');
            UInt8 month = (s[5] - '0') * 10 + (s[6] - '0');
            UInt8 day = (s[8] - '0') * 10 + (s[9] - '0');
            UInt8 hour = 0;
            UInt8 minute = 0;
            UInt8 second = 0;
            
            bool dt_long = (s[10] == ' ' || s[10] == 'T');
            if (dt_long)
            {
                hour = (s[11] - '0') * 10 + (s[12] - '0');
                minute = (s[14] - '0') * 10 + (s[15] - '0');
                second = (s[17] - '0') * 10 + (s[18] - '0');