Quickchecks don't execute unless `--compare=jit`

**Describe the bug**
Quickchecks don't execute unless `--compare=jit`.

Why would I want to slow down quickcheck execution by running it twice (interpreted and jit), and using the slow interpreter? What if I trust that JIT is correct and I just want to execute my quickcheck 4 billion times, as quickly as possible?

**To Reproduce**

1. Make a file with a quickcheck in it, name it foo.x
2. `dslx_interpreter_main-arm64 --evaluator ir-jit foo.x`, observe: `[ SKIPPING QUICKCHECKS ] (JIT is disabled)`. Also skips quickchecks: `--compare=none --evaluator ir-jit`
4. `dslx_interpreter_main-arm64 --compare=jit foo.x`, observe `RUN QUICKCHECK`
5. Note that if you supply both flags, that's rejected: `--compare flag is only supported on --evaluator=dslx-interpreter`

**Expected behavior**
I would expect that executing quickchecks as quickly as possible (i.e. with evaluator=jit and compare disabled) to be encouraged and accepted. I don't want to compare the interpreter against the JIT, that's just massively slowing things down.