Support Finished-based APIs for TLS 1.3

[samuel40791765]

Issues:

Addresses CryptoAlg-2699

Description of changes:

Another Ruby 3.1 test is depending on certain SSL APIs to retain information when using TLS1.3. This time it's the SSL_get(_peer)_finished APIs that are involved. OpenSSL treats the fields identically in 1.2 and 1.3 and uses the same API to update both state machines.
We already have our own individual ssl_get/send_finished for TLS 1.2 and tls13_add/process_finished for TLS 1.3. I've added the field updates within the corresponding TLS 1.3 functions so that these return the correct value within a 1.3 setting.

Call-outs:

The field buffer for previous_server_finished and
previous_client_finished has to grow past 12 since it's also used for
1.3 now. This breaks the original SSL Transfer assumption and we'll have
to bump the version while adding corresponding logic to account for the
updated size. I've regenerated the SSL Transfer bytes for the round trip
tests and also added a test for that as well. We're not bumping the
version number here since it's a pretty minuscule change. This doesn't
break compatibility with us parsing older versions of AWS-LC SSL
Transfers, but older versions of AWS-LC won't be able to parse the new
version.

Testing:

WIP

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 86.66667% with 4 lines in your changes missing coverage. Please review.

Project coverage is 78.76%. Comparing base (0cfd3ed) to head (f3b8dec).

Files with missing lines	Patch %	Lines
ssl/tls13_both.cc	77.77%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1952      +/-   ##
==========================================
- Coverage   78.77%   78.76%   -0.02%     
==========================================
  Files         590      590              
  Lines      101482   101506      +24     
  Branches    14396    14401       +5     
==========================================
+ Hits        79945    79950       +5     
- Misses      20902    20920      +18     
- Partials      635      636       +1     

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