Automatic merge from submit-queue (batch tested with PRs 63138, 63091, 63201, 63341). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Adds support for arm64 to microbot example of the kubernetes-worker charm.

**What this PR does / why we need it**: Adds support for arm64 to microbot example of the kubernetes-worker charm.

**Release note**:

```release-note
NONE
```