Replace onionperf.torproject.org with a redirect
As per ticket metrics/onionperf#40001, please replace the static site onionperf.torproject.org
with a redirect to https://gitlab.torproject.org/tpo/metrics/onionperf/-/wikis/home
Please also remove the jenkins jobs relating to building that static site - there are two jobs, one build and one install.
Thanks for your help!