fix: functional test leaks

[XavierChanth]

- What I did

• Enable functional tests

• Remove the teardown from functional tests which delete the shared enc keys

  • Causes bad state on non-ve atSigns
  • We still test for the creation of new shared enc keys at least once every time we spin up a new ve

• Fix all leaks in tests - except monitor

  • Monitor requires larger refactoring to ensure memory is cleaned up and all major edge-cases are testable, so I've disabled the test, with intention to rewrite new more comprehensive ones. It turns out my local had monitor tests which should fail, but they weren't failing.

- How I did it

- How to verify it

• unit tests have an additional memcheck step
• functional tests have a matrix for with/without memcheck

- Description for the changelog
fix: functional test leaks