Compile benchmark tests, but don't run them automatically with ctest

Ahmad Samir requested to merge work/ahmad/benchmark-default into master

Benchmarks aren't useful if no one is looking at the results (either when run locally or on the CI); change base64benchmark so that it's always compiled, so as not to bit-rot, but don't run it automatically when using e.g. ctest or make test.

See kio!301 (merged)

Merge request reports