Instead of generating them at loadtest runtime, we generate these
dynamic targets once via Nix. Because we're using libfaketime, we're not
bound to doing it at the same time as running the tests.
This allows us to run each loadtest right after each other, with minimal
other stuff going on inbetween. It's also a tiny bit more reproducible,
because the loadtests against both branches run with exactly the same
set of targets, where they did not before.
Wolfgang Walther
84e2a0c829