Automatic merge from submit-queue (batch tested with PRs 60197, 61614, 62074, 62071, 62301). 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>.
Add support for arm64 to juju charms.
**What this PR does / why we need it**: Add support for arm64 to juju charms.
**Release note**:
```release-note
NONE
```
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