refactor: Update to nerdctl and containerd v2.0.0

[sondavidb]

Issue #, if available:

Description of changes:

Updated libraries to use containerd 2.0 and nerdctl 2.0. This includes some functionality changes on nerdctl's end so I had to do some code changes to keep as similar behavior as possible.

FUNCIONALITY CHANGES:

• finch remove will only send a 400 now on error, as nerdctl no longer returns a specific error, instead returning a generic one (some volumes could not be removed) and having the specific error in the WARN logs. Not sure if there's a way around it, though. Changes e2e test to reflect this but not unit test.
• Namespacing has been added at a wider scale, so things such as networks can now be namespaced. This means that the way files are stored in the backend.
  • This change makes finch-daemon incompatible with nerdctl <2.0.0.

The first two commits should only include imports and package name changes and no real code functionality changes. The third commit should have all of the functionality changes (as well a couple of package name changes that I missed + changes I needed after rebasing, sorry 😔)

Testing done: make test-unit && make test-e2e

Worth noting that I had one test failure on my machine related to namespace overlap due to Docker using the same namespace, I tried changing the namespace but had some issues so I'll first see how the CI handles it before seeing what changes have to be made

• [X] I've reviewed the guidance in CONTRIBUTING.md

License Acceptance

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[sondavidb]

Given the backwards-incompatible nature of this change we will hold off on this until containerd announces their next LTS version