Chiseltest JNI Backend

[oliveryu11]

TODOs:

• Add a switch to go between JNI and JNA, via some annotation
• test on other computers and validate via CI
• Remove duplication between JNIUtils and JNAUtils
• Do a final performance benchmark with the GCD test
• clean up code/modified files

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✅ vighneshiyer
❌ Oliver Yu

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[ekiwi]

Before we merge this PR, please make sure that it works without this change.

[ekiwi]

That is important, because otherwise it will make chiseltest harder to use.

[ekiwi]

Ideally you would compile everything in the local test directory instead of a temporary directory. That will make it easier for debugging.

[ekiwi]

This looks very promising. I left some initial comments. Please ping me when this is ready for a more thorough review.