Account for cipher auth with multiple cert slots

[samuel40791765]

Issues:

Addresses CryptoAlg-2699

Description of changes:

Ruby has a dependency on the multiple certificate slot mechanisms that OpenSSL allows for. We've already done the work to support this, but another Ruby 3.1 test has exposed a gap in our support. We were only depending on the negotiated signature algorithms to retrieve the right certificate for the server to send back, but the cipher authentication scheme was also checked in OpenSSL as well. Ruby's tests happen to only depend on configuring the authentication scheme which brought this to light.
We happen to do only do this when checking private keys for TLS 1.0/1.1 , this also fixes it to check the cipher against the initial public key. This change also introduces all of the mentioned cipher authenticated check behavior for TLS 1.2.

Call-outs:

N/A

Testing:

New unit test that allows all possible sigalgs, with the cipher authentication suite being the only restriction.

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

Attention: Patch coverage is 98.24561% with 1 line in your changes missing coverage. Please review.

Project coverage is 78.88%. Comparing base (796202b) to head (19d003e).

Files with missing lines	Patch %	Lines
ssl/ssl_test.cc	96.77%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1956      +/-   ##
==========================================
+ Coverage   78.86%   78.88%   +0.01%     
==========================================
  Files         593      593              
  Lines      101933   101961      +28     
  Branches    14450    14454       +4     
==========================================
+ Hits        80386    80427      +41     
+ Misses      20903    20890      -13     
  Partials      644      644              

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