gh-148600: Add OpenSSL 4.0.0 support to test configurations

[clin1234]

Building off of 70eb56b:

• Add OpenSSL 4.0.0 to the build matrix in build.yml
• Add "4.0.0" to the OpenSSL versions list in multissltests.py

• Issue: Add support for OpenSSL 4.0.0 final #148600

[hugovk]

cc @vstinner

[picnixz]

We have other issues to address before this. This is premature.

[vstinner]

@picnixz:

We have other issues to address before this. This is premature.

I'm working on fixing the ssl module on EOF: see issue gh-148292.

[vstinner]

I'm working on fixing the ssl module on EOF: see issue #148292.

I fixed this issue. This PR now has conflicts. It was simpler for me to just create a new PR based on this one: PR gh-149356.