Recognise known safe DH groups/primes and short-circuit Diffie-Hellman test

[torben-hansen]

Issues:

#3335

Description of changes:

Draft for now. Need to review.

Call-outs:

Testing:

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.

[github-actions]

clang-tidy made some suggestions

[github-actions]

warning: unknown type name 'BN_ULONG' [clang-diagnostic-error]

DH *dh_calculate_rfc7919_from_p(const BN_ULONG data[], size_t data_len);
                                      ^

[codecov-commenter]

Codecov Report

❌ Patch coverage is 90.26549% with 11 lines in your changes missing coverage. Please review.
✅ Project coverage is 78.20%. Comparing base (6283365) to head (acd43ea).
⚠️ Report is 5 commits behind head on main.

Files with missing lines	Patch %	Lines
crypto/dh_extra/params.c	88.88%	9 Missing ⚠️
crypto/dh_extra/dh_test.cc	92.85%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3337      +/-   ##
==========================================
- Coverage   78.21%   78.20%   -0.02%     
==========================================
  Files         693      693              
  Lines      123900   124048     +148     
  Branches    17208    17226      +18     
==========================================
+ Hits        96910    97013     +103     
- Misses      26072    26116      +44     
- Partials      918      919       +1     

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