ML-KEM encapsulation key modulus check

[dkostic]

Issues:

CryptoAlg-2620

Description of changes:

ML-KEM encapsulation key modulus check as specified in FIPS 203 Section 7.2.
https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.203.pdf

Call-outs:

Point out areas that need special attention or support during the review process. Discuss architecture or design changes.

Testing:

How is this change tested (unit tests, fuzz tests, etc.)? Are there any testing steps to be verified by the reviewer?

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license and the ISC license.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.47%. Comparing base (7090b90) to head (c559789).
Report is 7 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1868   +/-   ##
=======================================
  Coverage   78.46%   78.47%           
=======================================
  Files         585      585           
  Lines       99457    99506   +49     
  Branches    14236    14247   +11     
=======================================
+ Hits        78038    78085   +47     
- Misses      20784    20786    +2     
  Partials      635      635           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.