Add ability to add annotations to the k8up service account
Cleanup of: #876
Checklist
For Helm Chart changes
[x] Categorize the PR by setting a good title and adding one of the labels:
bug, enhancement, documentation, change, breaking, dependency
as they show up in the changelog
[x] PR contains the label area:chart
[x] PR contains the chart label, e.g. chart:k8up
[x] Variables are documented in the values.yaml using the format required by Helm-Docs.
[x] Chart Version bumped if immediate release after merging is planned
[x] I have run make chart-docs
[x] Link this PR to related code release or other issues.
Summary
Cleanup of: #876
Checklist
For Helm Chart changes
bug,enhancement,documentation,change,breaking,dependencyas they show up in the changelogarea:chartchart:k8upmake chart-docs