Support an Openssl 3.0 build

[raycoll]

Problem:

Per https://www.openssl.org/source/ , there is an alpha release available for Openssl 3.0. s2n supports builds with Openssl 1.1.1 and Openssl 1.0.2 which are supported until 2023 and 2019 respectively.

One notable improvement in Openssl 3.0 is FIPS becomes a runtime setting https://wiki.openssl.org/index.php/OpenSSL_3.0#Programmatically_loading_the_FIPS_module_.28default_library_context.29 .

Proposed Solution:

Add a new codebuild dimension that uses Openssl 3.0. We should not transition a majority of our tests to use 3.0 before 3.0 is ready for wide adoption.

[raycoll]

Opening this now, but I don't think it's a high priority yet.

[alexw91]

Openssl 3.0 has been released: https://www.openssl.org/blog/blog/2021/09/07/OpenSSL3.Final/

[dougch]

With 3.0 released, we're starting to track specific failures, e.g.: #3082

[toidiu]

ossl3 support has been added: https://github.com/aws/s2n-tls/issues/3442