Rewrite aes_nohw.c to aes_nohw.rs.

[briansmith]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 99.69651% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 97.26%. Comparing base (be4ba83) to head (897c90b).
Report is 1 commits behind head on main.

Files	Patch %	Lines
src/aead/aes/aes_nohw.rs	99.83%	1 Missing ⚠️
src/constant_time.rs	96.87%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2070      +/-   ##
==========================================
+ Coverage   97.24%   97.26%   +0.02%     
==========================================
  Files         144      144              
  Lines       19998    20134     +136     
  Branches      228      205      -23     
==========================================
+ Hits        19447    19584     +137     
  Misses        525      525              
+ Partials       26       25       -1     

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