**Describe the issue**
```
milovidov-desktop :) SELECT parseDateTimeBestEffort('20220101-010203')

SELECT parseDateTimeBestEffort('20220101-010203')


0 rows in set. Elapsed: 0.153 sec. 

Received exception:
Code: 41. DB::Exception: Cannot read DateTime: unexpected number of decimal digits for time zone offset: 6: While processing parseDateTimeBestEffort('20220101-010203'). (CANNOT_PARSE_DATETIME)
```
UInt8 hour_or_day_of_month_or_month = 0;
                if (num_digits == 2)
                    readDecimalNumber<2>(hour_or_day_of_month_or_month, digits);
                else if (num_digits == 1)   
                    readDecimalNumber<1>(hour_or_day_of_month_or_month, digits);
                else
                    return on_error("Cannot read DateTime: logical error, unexpected branch in code", ErrorCodes::LOGICAL_ERROR);
                if (checkChar(':', in))
                {
                    if (has_time)
                        return on_error("Cannot read DateTime: time component is duplicated", ErrorCodes::CANNOT_PARSE_DATETIME);
                    hour = hour_or_day_of_month_or_month;
                    has_time = true;
                    num_digits = readDigits(digits, sizeof(digits), in);
                    if (num_digits == 2)
                        readDecimalNumber<2>(minute, digits);
                    else if (num_digits == 1)
                        readDecimalNumber<1>(minute, digits);
                    else
                        return on_error("Cannot read DateTime: unexpected number of decimal digits after hour: " + toString(num_digits), ErrorCodes::CANNOT_PARSE_DATETIME);