Match Snowflake MD5 to Python MD5

A quick example (from a teammate) to pull this off. In Python:

import hashlib
def md5_number_lower64(msg):
    return int.from_bytes(hashlib.md5(msg.encode('utf-8')).digest()[8:], 'big')

returns:

$ print(md5_number_lower64('Snowflake'))
> 9203306159527282910`

which matches Snowflake's result:

select md5_number_lower64('Snowflake');
-- 9203306159527282910

Docs:

• https://docs.snowflake.com/en/sql-reference/functions/md5_number_lower64.html

Returns a 64 bit unsigned integer that represents the lower 64 bits of the message digest. This representation is useful for maximally efficient storage and comparison of MD5 digests.