**Describe the bug**

-2147483648 is the minimum integer representable with Int32, but ``toInt32OrNull('-2147483648')`` returns ``NULL``. On the other hand ``toInt32('-2147483648')`` correctly returns ``-2147483648``.

**Does it reproduce on recent release?**

Yes. It happens on 21.7.5.29-stable

**How to reproduce**

```
SELECT
    toInt32('-2147483648'),
    toInt32OrNull('-2147483648')

Query id: 94f4e069-6c0e-44d9-8e94-7ee83b90a529

┌─toInt32('-2147483648')─┬─toInt32OrNull('-2147483648')─┐
│            -2147483648 │                         ᴺᵁᴸᴸ │
└────────────────────────┴──────────────────────────────┘
```

**Expected behavior**

``toInt32('-2147483648')`` and ``toInt32OrNull('-2147483648')`` should both return ``-2147483648``.

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    size_t size = 0;
    readVarUInt(size, buf);
    if (size > MAX_VECTOR_SIZE)
        throw Poco::Exception("Too large vector size.");
    v.resize(size);
    for (size_t i = 0; i < size; ++i)
        readBinary(v[i], buf);
}
void assertString(const char * s, ReadBuffer & buf);
void assertEOF(ReadBuffer & buf);
[[noreturn]] void throwAtAssertionFailed(const char * s, ReadBuffer & buf);
inline bool checkChar(char c, ReadBuffer & buf)  
{
    char a;
    if (!buf.peek(a) || a != c)
        return false;
    buf.ignore();
    return true;
}
inline void assertChar(char symbol, ReadBuffer & buf)
{
    if (!checkChar(symbol, buf))
    {
        char err[2] = {symbol, '\0'};
        throwAtAssertionFailed(err, buf);
    }
}
inline void assertString(const String & s, ReadBuffer & buf)