New Snowflake ID Conversion Functions Added and Old Functions Deprecated

New functions snowflakeIDToDateTime, snowflakeIDToDateTime64, dateTimeToSnowflakeID, and dateTime64ToSnowflakeID were added. Unlike the existing functions snowflakeToDateTime, snowflakeToDateTime64, dateTimeToSnowflake, and dateTime64ToSnowflake, the new functions are compatible with function generateSnowflakeID, i.e. they accept the snowflake IDs generated by generateSnowflakeID and produce snowflake IDs of the same type as generateSnowflakeID (i.e. UInt64). Furthermore, the new functions default to the UNIX epoch (aka. 1970-01-01), just like generateSnowflakeID. If necessary, a different epoch, e.g. Twitter's/X's epoch 2010-11-04 aka. 1288834974657 msec since UNIX epoch, can be passed. The old conversion functions are deprecated and will be removed after a transition period: to use them regardless, enable setting allow_deprecated_snowflake_conversion_functions. #64948 (Robert Schulze).