Domain Separation for ML-KEM Intermediate Values

In ML-KEM-*.txt inside intermediate, it seems like ρ and σ values are generated from `d` by `G(d)` (probably!), but in the current [FIPS 203 ](https://csrc.nist.gov/pubs/fips/203/final) Algorithm 13 specifies that it should be generated by `G(d||k)`

Start with the ML-KEM-*.txt files in intermediate and compare their ρ and σ generation against FIPS 203 Algorithm 13. Verify whether the vectors use G(d) or G(d||k), then update the affected intermediate values and confirm the files reflect the specification.

Written by the indexing model from the issue text.