Release v0.3.0

[jriedel-ionos]

Release

Release v0.3.0

Checklist

• [x] (Minor Release) Update metadata & clusterctl-settings.
• [x] (Minor Release) Update version in e2e config.
• [x] Update docs (compatibility table; usage etc).
• [x] (Minor Release) Create release branch release-0.3
• [x] Create tag v0.3.0.
• [x] Update the draft release notes with generated release notes from sigs.k8s.io/cluster-api/hack/tools/release/notes
• [x] Update the created draft release to include things like breaking changes or important notes.
• [x] Check that the release contains the relevant artifacts.
• [x] Publish the release.
• [x] Test provider installation/upgrade with clusterctl