Depends on D4504
context: [[ https://linear.app/comm/issue/ENG-1367/measure-utf-8-dynamodb-table-name-string-length-correctly-when | here ]]
Chars encoded in utf8 have different size between 1 and 4 bytes. Standard length method return different values on different architectures. To avoid that, we need to have an universal function for counting string bytes.