Use Java 17

[mpkorstanje]

🤔 What's changed?

• Set default release version to 17
• Enable Error prone with Nullaway
• Enable Checkstyle

⚡️ What's your motivation?

• Consider changing Java baseline to 17 cucumber-jvm#2962
• Consider nullability annotations and compile-time checks cucumber-jvm#3000

🏷️ What kind of change is this?

• 💥 Breaking change (incompatible changes to the API)

♻️ Anything particular you want feedback on?

📋 Checklist:

• Use Java 17 cucumber-parent#62
• I agree to respect and uphold the Cucumber Community Code of Conduct
• I've changed the behaviour of the code
  • I have added/updated tests to cover my changes.
• My change requires a change to the documentation.
  • I have updated the documentation accordingly.
• Users should know about my change
  • I have added an entry to the "Unreleased" section of the CHANGELOG, linking to this pull request.