b1350af951
Raname token_column_computation to legacy_token_column_computation, as it will be replaced with new column_computation. The reason is that this computation returns bytes, but all tokens in Scylla can now be represented by int64_t. Moreover, returning bytes causes invalid token ordering as bytes comparison is done in unsigned way (not signed as int64_t). See issue: https://github.com/scylladb/scylla/issues/7443