Move ML-DSA to FIPSMODULE

[jakemas]

Issues:

Move ML-DSA to FIPS module.

ML-DSA is still off by default in the FIPS module. We will be removing the enable_dilithium flag in #2096.

Description of changes:

The following files have been moved from the crypto/dilithium/ directory:

• Testing framework p_pqdsa_test.cc moved to evp_extra/p_pqdsa_test.cc
• Reference implementation directory pqcrystals_dilithium_ref_common/ moved to fipsmodule/ml_dsa/ml_dsa_ref/
• ml_dsa.{h/c} moved to fipsmodule/ml_dsa/

This is consistant with the ML-KEM implementation in the fipsmodule, that has a kem folder (analogous to the pqdsa folder) and ml_kem folder (analogous to ml_dsa folder).

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 78.76%. Comparing base (edeb62f) to head (5e54cda).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2095      +/-   ##
==========================================
+ Coverage   78.74%   78.76%   +0.01%     
==========================================
  Files         598      598              
  Lines      103656   103656              
  Branches    14720    14719       -1     
==========================================
+ Hits        81629    81645      +16     
+ Misses      21375    21359      -16     
  Partials      652      652              

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