Remove references to java backend from main regression test suite

[dwightguth]

Here we remove all calls to the Java backend from the main test suite in preparation for deletion of the backend itself.

Tests were converted to the llvm or haskell backend from the Java backend, run, and then gradually refined until it was either clear the test relied on behavior of the Java backend that couldn't easily be replicated, in which case we deleted the test, or until the test behaved in a sensible fashion, at which point test output files were updated as needed.

We also remove references to a couple different command line flags which will be deleted when the Java backend is removed.

[radumereuta]

Overall looks good.
But there are still a few warnings printed by the haskell backend for missing no-evaluators.
We should try to keep the output clean so it's easier to spot where something fails.

[dwightguth]

There was one remaining test left that still had warnings about functions without evaluators. I fixed it. Please re-review.

[radumereuta]

There are still a few warnings thrown from the haskell backend through kprove-legacy, but they are small. We may want to tackle those with another update to remove kprove-legacy.

[dwightguth]

I agree that should be a separate pr.