[graphite] Use v1 ingress

[markusheiden]

What this PR does / why we need it:

Use v1 ingress for Graphite. The used v1beta1 ingress has been deprecated since Kubernetes 1.19 and has already been removed in 1.22.

Checklist

[Place an '[x]' (no spaces) in all applicable fields. Please remove unrelated fields.]

• [x] DCO signed
• [x] Chart Version bumped (if the pr is an update to an existing chart)
• [x] Title of the PR starts with chart name (e.g. [fluentd-elasticsearch])

[rpahli]

@markusheiden pls update the chart maior version. This is a breaking change.