`SELECT bitShiftLeft(toInt256(-2), number)`

`shift left for negative lhsbers is underfined!`

See https://clickhouse-test-reports.s3.yandex.net/14525/44726c37c3003ec8112dbf32efa350bd595163b3/fuzzer/report.html#fail1
{
    return to_string(x);
}
template <typename To, typename From>
inline To bigint_cast(const From & x [[maybe_unused]])
{
    return static_cast<To>(x);
}