Remove references to old algorithms in templating code

[xvzcf]

There are still some references to SIKE, Rainbow, etc. in the oqs-template folder (and possibly elsewhere); just making an issue here so as to not lose track.

[dstebila]

The OpenSSL project has indicated that OpenSSL 1.1.1 will reach end-of-life in September 2023. As such, we are discontinuing development on OQS-OpenSSL 1.1.1, and recommend all users switch to OpenSSL 3 and the OQS Provider for OpenSSL 3, which provides all the same functionality that OQS-OpenSSL 1.1.1 does. Hence we are closing open pull requests and issues in OQS-OpenSSL 1.1.1 as won't-fix.