[WFSSL-92] Allow using EC certificates with OpenSSL

[rmartinc]

Adding EC to the allowed key/certificate algorithm list. The BasicOpenSSLSocketECTest checks a TLSv1.2 and TLSv1.3 connection between client and server using EC certificates (mutual SSL auth).

[rmartinc]

@fjuma I think this line is not correct, it should be the last version released 2.2.0.Final. If not the artifact is not found for windows and macos during the CI. Thanks!

[fjuma]

@rmartinc Good catch, you are correct! If you have a sec and wanted to submit a PR to fix that, that would be great. Otherwise, I'll try to do that later today.

[rmartinc]

Done in #118! I'll rebase this one once the other is merged. Thanks!

[rmartinc]

@fjuma remember that this PR is here. It's a small fix but it would be good to have EC also in openssl.

[fjuma]

Thanks for the reminder, @rmartinc!

[rmartinc]

@fjuma Do you think this is interesting? I'm just going over my list of PRs...

[darranl]

Just catching up on old PRs on this project.

I am not familiar with how other keystores are managed on this project yet but in general I am not a fan of keystores in source code without at least some docuementation describing how to create them.

Ideally though I prefer them to be created on demand so we know they are not going to expire / need replacing etc...