Release v0.3.0

What's Changed

• Style improvements in e2e tests by @neoaggelos in #3
• use Cluster name instead of LXCCluster name to annotate objects by @neoaggelos in #4
• Cleanup cluster templates by @neoaggelos in #5
• docs: Update image versions from default simplestreams server by @neoaggelos in #8
• e2e: Fixes and improvements by @neoaggelos in #7
• Update and cleanup image build scripts by @neoaggelos in #10
• Drop cd docs/book && make test from CI by @neoaggelos in #9
• Use a hash of the namespace in the load balancer instance name by @neoaggelos in #6
• Add e2e cluster upgrade test by @neoaggelos in #13
• dev: go mod tidy by @neoaggelos in #12
• Add upstream Kubernetes conformance tests by @neoaggelos in #11
• Add e2e test with ubuntu flavor (install kubeadm during cloud-init) by @neoaggelos in #14
• Pull kubeadm images for target base image version by @neoaggelos in #16
• Consider BootstrapSucceeded condition when setting LXCMachine status by @neoaggelos in #15
• Update fingerprint of kubeadm/v1.32.0 images by @neoaggelos in #17

Full Changelog: v0.2.0...v0.3.0