Automatic merge from submit-queue (batch tested with PRs 42740, 44980, 45039, 41627, 45044)

Update kubernetes-e2e charm to use snaps

**What this PR does / why we need it**:

This updates the kubernetes-e2e charm to use snaps instead of Juju resources for payload delivery.

The main advantage of this is that it decouples the charm from the e2e payload, allowing us to support multiple versions of Kubernetes with a single release of the charm.

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #

**Special notes for your reviewer**:

**Release note**:

```release-note
Update kubernetes-e2e charm to use snaps
```