Fixes two bugs with the schema definitions:
- Adds resources that are a part of the baseSchema (but aren't k8s resources).
- Adds logic to handle resources which aren't in a prefered version, but
are still in some version.
Some tests which relied on timeouts were a bit flaky in CI. This PR
refactors a few of them to work on a more reliable method of receiving
from a channel and raises the timeout of another test.
In the original implementation of the definition handler, the resource
list was checked for preferred version, and this overrode the preferred
version of the overall group. However, this logic was inaccurate and
did not use the group as the source of truth on the preferred version
like it should have.
Updates the schema definitions refresh method to use a new debounce
method. Adds a handler which refreshes the definitions every 2
seconds after adding a CRD and every 10 minutes by default.
