Replace Joda-Time with native java.time

[lennartkoopmann]

Remove Joda-Time from the POMs and replace all calls with the native java.time APIs. It would be a good idea to do this as early as possible in the development cycle to expose potential logical issues to testing for as long as possible.

[loncarales]

Hi @lennartkoopmann

Before refactoring Joda-Time to java.time API in nzyme, the nzyme-plugin lib must be refactored. I took the privilege and refactored it. nzymeorg/nzyme-plugin#1

Let me know if this change follows the set milestone. I would be happy to do this change also in nzyme repo.