add C++ linking test

[aidenfoxivey]

Already worked on this code before - just added the variable to compile with Dilithium-2 support. It's already run in my local version of the repo.

It should be good to merge - but maybe one more glance over would be ideal.

[baentsch]

This time the test ran. So LGTM for now.

As consideration for a future update: Change the test to run with a more "long term viable" algorithm (dilithium will most likely be removed at some point in the future which will make the test become stale).

Thanks for the contribution and seeing this through, @aidenfoxivey !

Question to @ryjones : Why did CI run this time without problems?

[dstebila]

This time the test ran. So LGTM for now.

As consideration for a future update: Change the test to run with a more "long term viable" algorithm (dilithium will most likely be removed at some point in the future which will make the test become stale).

Thanks for the contribution and seeing this through, @aidenfoxivey !

Question to @ryjones : Why did CI run this time without problems?

I clicked "Approve and run"

[aidenfoxivey]

This time the test ran. So LGTM for now.

As consideration for a future update: Change the test to run with a more "long term viable" algorithm (dilithium will most likely be removed at some point in the future which will make the test become stale).

Thanks for the contribution and seeing this through, @aidenfoxivey !

Question to @ryjones : Why did CI run this time without problems?

I'll make a future PR to change from using Dilithium to something else. I just copied this from the one test I found in C.